21475104 has 48 divisors (see below), whose sum is σ = 64427328. Its totient is φ = 6135552.

The previous prime is 21475079. The next prime is 21475127. The reversal of 21475104 is 40157412.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×21475104² = 922360183621632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15307 + ... + 16650.

It is an arithmetic number, because the mean of its divisors is an integer number (1342236).

Almost surely, 2^21475104 is an apocalyptic number.

21475104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21475104 is an abundant number, since it is smaller than the sum of its proper divisors (42952224).

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

21475104 is a wasteful number, since it uses less digits than its factorization.

21475104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31977 (or 31969 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 21475104 is about 4634.1238654140. The cubic root of 21475104 is about 277.9575181364.

The spelling of 21475104 in words is "twenty-one million, four hundred seventy-five thousand, one hundred four".