20787192 has 144 divisors (see below), whose sum is σ = 63696360. Its totient is φ = 6345216.

The previous prime is 20787187. The next prime is 20787203. The reversal of 20787192 is 29178702.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 561798 + ... + 561834.

Almost surely, 2^20787192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20787192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31848180).

20787192 is an abundant number, since it is smaller than the sum of its proper divisors (42909168).

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

20787192 is a wasteful number, since it uses less digits than its factorization.

20787192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 20787192 is about 4559.2973142799. The cubic root of 20787192 is about 274.9573134846.

The spelling of 20787192 in words is "twenty million, seven hundred eighty-seven thousand, one hundred ninety-two".