21470892 has 24 divisors (see below), whose sum is σ = 50175216. Its totient is φ = 7146048.

The previous prime is 21470843. The next prime is 21470899. The reversal of 21470892 is 29807412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21470899) 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, 12298 + ... + 13934.

It is an arithmetic number, because the mean of its divisors is an integer number (2090634).

Almost surely, 2^21470892 is an apocalyptic number.

It is an amenable number.

21470892 is an abundant number, since it is smaller than the sum of its proper divisors (28704324).

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

21470892 is a wasteful number, since it uses less digits than its factorization.

21470892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737 (or 2735 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 21470892 is about 4633.6693882926. The cubic root of 21470892 is about 277.9393446331.

The spelling of 21470892 in words is "twenty-one million, four hundred seventy thousand, eight hundred ninety-two".