19973460 has 96 divisors (see below), whose sum is σ = 62375040. Its totient is φ = 4741632.

The previous prime is 19973423. The next prime is 19973461. The reversal of 19973460 is 6437991.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19973461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22179 + ... + 23061.

It is an arithmetic number, because the mean of its divisors is an integer number (649740).

Almost surely, 2^19973460 is an apocalyptic number.

19973460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19973460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31187520).

19973460 is an abundant number, since it is smaller than the sum of its proper divisors (42401580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19973460 is a wasteful number, since it uses less digits than its factorization.

19973460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 935 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 19973460 is about 4469.1677077505. The cubic root of 19973460 is about 271.3216407711.

The spelling of 19973460 in words is "nineteen million, nine hundred seventy-three thousand, four hundred sixty".