21739001840716 has 24 divisors (see below), whose sum is σ = 38694356527680. Its totient is φ = 10683724339200.

The previous prime is 21739001840713. The next prime is 21739001840729. The reversal of 21739001840716 is 61704810093712.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21739001840716.

It is not an unprimeable number, because it can be changed into a prime (21739001840711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31272340 + ... + 31959931.

It is an arithmetic number, because the mean of its divisors is an integer number (1612264855320).

Almost surely, 2^{21739001840716} is an apocalyptic number.

It is an amenable number.

21739001840716 is a deficient number, since it is larger than the sum of its proper divisors (16955354686964).

21739001840716 is a wasteful number, since it uses less digits than its factorization.

21739001840716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63233745 (or 63233743 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 21739001840716 in words is "twenty-one trillion, seven hundred thirty-nine billion, one million, eight hundred forty thousand, seven hundred sixteen".