21475107 has 12 divisors (see below), whose sum is σ = 31193344. Its totient is φ = 14236560.

The previous prime is 21475079. The next prime is 21475127. The reversal of 21475107 is 70157412.

21475107 is a `hidden beast` number, since 2 + 147 + 510 + 7 = 666.

It is not a de Polignac number, because 21475107 - 2⁶ = 21475043 is a prime.

It is a super-2 number, since 2×21475107² = 922360441322898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21475127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4963 + ... + 8220.

Almost surely, 2^21475107 is an apocalyptic number.

21475107 is a deficient number, since it is larger than the sum of its proper divisors (9718237).

21475107 is a wasteful number, since it uses less digits than its factorization.

21475107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13370 (or 13367 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 21475107 is about 4634.1241890998. The cubic root of 21475107 is about 277.9575310796.

The spelling of 21475107 in words is "twenty-one million, four hundred seventy-five thousand, one hundred seven".