20525723977 has 8 divisors (see below), whose sum is σ = 22399511040. Its totient is φ = 18653238960.

The previous prime is 20525723927. The next prime is 20525723987. The reversal of 20525723977 is 77932752502.

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 20525723977 - 2¹⁵ = 20525691209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20525723977.

It is not an unprimeable number, because it can be changed into a prime (20525723927) 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, 292398 + ... + 355735.

It is an arithmetic number, because the mean of its divisors is an integer number (2799938880).

Almost surely, 2^20525723977 is an apocalyptic number.

It is an amenable number.

20525723977 is a deficient number, since it is larger than the sum of its proper divisors (1873787063).

20525723977 is a wasteful number, since it uses less digits than its factorization.

20525723977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651023.

The product of its (nonzero) digits is 1852200, while the sum is 49.

The spelling of 20525723977 in words is "twenty billion, five hundred twenty-five million, seven hundred twenty-three thousand, nine hundred seventy-seven".