21374263623216 has 80 divisors (see below), whose sum is σ = 64046834065664. Its totient is φ = 6015784211712.

The previous prime is 21374263623203. The next prime is 21374263623221. The reversal of 21374263623216 is 61232636247312.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

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 15 ways as a sum of consecutive naturals, for example, 474707935 + ... + 474752958.

Almost surely, 2^{21374263623216} is an apocalyptic number.

It is an amenable number.

21374263623216 is an abundant number, since it is smaller than the sum of its proper divisors (42672570442448).

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

21374263623216 is a wasteful number, since it uses less digits than its factorization.

21374263623216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949460978 (or 949460972 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 48.

The spelling of 21374263623216 in words is "twenty-one trillion, three hundred seventy-four billion, two hundred sixty-three million, six hundred twenty-three thousand, two hundred sixteen".