21506214674004 has 24 divisors (see below), whose sum is σ = 53133000959808. Its totient is φ = 6747047740800.

The previous prime is 21506214674003. The next prime is 21506214674051. The reversal of 21506214674004 is 40047641260512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21506214674003) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 52711310272 + ... + 52711310679.

It is an arithmetic number, because the mean of its divisors is an integer number (2213875039992).

Almost surely, 2^{21506214674004} is an apocalyptic number.

It is an amenable number.

21506214674004 is an abundant number, since it is smaller than the sum of its proper divisors (31626786285804).

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

21506214674004 is a wasteful number, since it uses less digits than its factorization.

21506214674004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105422620975 (or 105422620973 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 21506214674004 in words is "twenty-one trillion, five hundred six billion, two hundred fourteen million, six hundred seventy-four thousand, four".