21475032 has 16 divisors (see below), whose sum is σ = 53687640. Its totient is φ = 7158336.

The previous prime is 21475019. The next prime is 21475043. The reversal of 21475032 is 23057412.

It is a super-2 number, since 2×21475032² = 922353998802048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 894793 = 21475032 / (2 + 1 + 4 + 7 + 5 + 0 + 3 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21474993 and 21475011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447373 + ... + 447420.

Almost surely, 2^21475032 is an apocalyptic number.

It is an amenable number.

21475032 is an abundant number, since it is smaller than the sum of its proper divisors (32212608).

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

21475032 is a wasteful number, since it uses less digits than its factorization.

21475032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894802 (or 894798 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 21475032 is about 4634.1160969488. The cubic root of 21475032 is about 277.9572074981.

The spelling of 21475032 in words is "twenty-one million, four hundred seventy-five thousand, thirty-two".