21507470052012 has 36 divisors (see below), whose sum is σ = 62132691262096. Its totient is φ = 6144991443360.

The previous prime is 21507470052001. The next prime is 21507470052139. The reversal of 21507470052012 is 21025007470512.

21507470052012 is a `hidden beast` number, since 2 + 1 + 50 + 7 + 4 + 70 + 0 + 520 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42673551439 + ... + 42673551942.

Almost surely, 2^{21507470052012} is an apocalyptic number.

It is an amenable number.

21507470052012 is an abundant number, since it is smaller than the sum of its proper divisors (40625221210084).

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

21507470052012 is a wasteful number, since it uses less digits than its factorization.

21507470052012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85347103398 (or 85347103393 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The spelling of 21507470052012 in words is "twenty-one trillion, five hundred seven billion, four hundred seventy million, fifty-two thousand, twelve".