20623571497 has 8 divisors (see below), whose sum is σ = 20670725600. Its totient is φ = 20576463264.

The previous prime is 20623571491. The next prime is 20623571509. The reversal of 20623571497 is 79417532602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20623571497 - 2²⁷ = 20489353769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20623571491) 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, 985618 + ... + 1006324.

It is an arithmetic number, because the mean of its divisors is an integer number (2583840700).

Almost surely, 2^20623571497 is an apocalyptic number.

It is an amenable number.

20623571497 is a deficient number, since it is larger than the sum of its proper divisors (47154103).

20623571497 is a wasteful number, since it uses less digits than its factorization.

20623571497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22935.

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 20623571497 in words is "twenty billion, six hundred twenty-three million, five hundred seventy-one thousand, four hundred ninety-seven".