21973060 has 24 divisors (see below), whose sum is σ = 46730880. Its totient is φ = 8677344.

The previous prime is 21973051. The next prime is 21973069. The reversal of 21973060 is 6037912.

It is an interprime number because it is at equal distance from previous prime (21973051) and next prime (21973069).

It is not an unprimeable number, because it can be changed into a prime (21973069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5374 + ... + 8533.

It is an arithmetic number, because the mean of its divisors is an integer number (1947120).

Almost surely, 2^21973060 is an apocalyptic number.

21973060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21973060 is an abundant number, since it is smaller than the sum of its proper divisors (24757820).

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

21973060 is a wasteful number, since it uses less digits than its factorization.

21973060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13995 (or 13993 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 21973060 is about 4687.5430664688. The cubic root of 21973060 is about 280.0895121974.

The spelling of 21973060 in words is "twenty-one million, nine hundred seventy-three thousand, sixty".