20623381064 has 32 divisors (see below), whose sum is σ = 45429128640. Its totient is φ = 8653166400.

The previous prime is 20623381063. The next prime is 20623381081. The reversal of 20623381064 is 46018332602.

It is not an unprimeable number, because it can be changed into a prime (20623381063) 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, 9012572 + ... + 9014859.

It is an arithmetic number, because the mean of its divisors is an integer number (1419660270).

Almost surely, 2^20623381064 is an apocalyptic number.

It is an amenable number.

20623381064 is an abundant number, since it is smaller than the sum of its proper divisors (24805747576).

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

20623381064 is a wasteful number, since it uses less digits than its factorization.

20623381064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18027461 (or 18027457 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 20623381064 in words is "twenty billion, six hundred twenty-three million, three hundred eighty-one thousand, sixty-four".