21374403736156 has 48 divisors (see below), whose sum is σ = 39072162528000. Its totient is φ = 10211901131520.

The previous prime is 21374403736139. The next prime is 21374403736157. The reversal of 21374403736156 is 65163730447312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374403736157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438092395 + ... + 438141181.

It is an arithmetic number, because the mean of its divisors is an integer number (814003386000).

Almost surely, 2^{21374403736156} is an apocalyptic number.

It is an amenable number.

21374403736156 is a deficient number, since it is larger than the sum of its proper divisors (17697758791844).

21374403736156 is a wasteful number, since it uses less digits than its factorization.

21374403736156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53674 (or 53672 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 52.

The spelling of 21374403736156 in words is "twenty-one trillion, three hundred seventy-four billion, four hundred three million, seven hundred thirty-six thousand, one hundred fifty-six".