38640022421 has 32 divisors (see below), whose sum is σ = 52016283648. Its totient is φ = 27720181440.

The previous prime is 38640022397. The next prime is 38640022457. The reversal of 38640022421 is 12422004683.

It is not a de Polignac number, because 38640022421 - 2¹⁴ = 38640006037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38640021421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 332990 + ... + 433776.

It is an arithmetic number, because the mean of its divisors is an integer number (1625508864).

Almost surely, 2^38640022421 is an apocalyptic number.

It is an amenable number.

38640022421 is a deficient number, since it is larger than the sum of its proper divisors (13376261227).

38640022421 is a wasteful number, since it uses less digits than its factorization.

38640022421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101201.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 38640022421 in words is "thirty-eight billion, six hundred forty million, twenty-two thousand, four hundred twenty-one".