20723657488 has 40 divisors (see below), whose sum is σ = 41008312800. Its totient is φ = 10142379264.

The previous prime is 20723657477. The next prime is 20723657519. The reversal of 20723657488 is 88475632702.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172843 + ... + 267061.

It is an arithmetic number, because the mean of its divisors is an integer number (1025207820).

Almost surely, 2^20723657488 is an apocalyptic number.

It is an amenable number.

20723657488 is a deficient number, since it is larger than the sum of its proper divisors (20284655312).

20723657488 is a wasteful number, since it uses less digits than its factorization.

20723657488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94519 (or 94513 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 52.

The spelling of 20723657488 in words is "twenty billion, seven hundred twenty-three million, six hundred fifty-seven thousand, four hundred eighty-eight".