21474892 has 12 divisors (see below), whose sum is σ = 37630656. Its totient is φ = 10723280.

The previous prime is 21474851. The next prime is 21474913. The reversal of 21474892 is 29847412.

It is a super-2 number, since 2×21474892² = 922341972823328, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342 + ... + 6562.

It is an arithmetic number, because the mean of its divisors is an integer number (3135888).

Almost surely, 2^21474892 is an apocalyptic number.

It is an amenable number.

21474892 is a deficient number, since it is larger than the sum of its proper divisors (16155764).

21474892 is a wasteful number, since it uses less digits than its factorization.

21474892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7088 (or 7086 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 21474892 is about 4634.1009915624. The cubic root of 21474892 is about 277.9566034774.

It can be divided in two parts, 214748 and 92, that added together give a triangular number (214840 = T₆₅₅).

The spelling of 21474892 in words is "twenty-one million, four hundred seventy-four thousand, eight hundred ninety-two".