21467751272704 has 72 divisors (see below), whose sum is σ = 46785046569408. Its totient is φ = 9750178682880.

The previous prime is 21467751272659. The next prime is 21467751272761. The reversal of 21467751272704 is 40727215776412.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401949 + ... + 6564835.

It is an arithmetic number, because the mean of its divisors is an integer number (649792313464).

Almost surely, 2^{21467751272704} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21467751272704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23392523284704).

21467751272704 is an abundant number, since it is smaller than the sum of its proper divisors (25317295296704).

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

21467751272704 is a wasteful number, since it uses less digits than its factorization.

21467751272704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6164151 (or 6164137 counting only the distinct ones).

The product of its (nonzero) digits is 9219840, while the sum is 55.

The spelling of 21467751272704 in words is "twenty-one trillion, four hundred sixty-seven billion, seven hundred fifty-one million, two hundred seventy-two thousand, seven hundred four".