20972686377 has 8 divisors (see below), whose sum is σ = 27965250720. Its totient is φ = 13980956480.

The previous prime is 20972686369. The next prime is 20972686387. The reversal of 20972686377 is 77368627902.

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 20972686377 - 2³ = 20972686369 is a prime.

It is a super-2 number, since 2×20972686377² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20972686387) 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, 147399 + ... + 252332.

It is an arithmetic number, because the mean of its divisors is an integer number (3495656340).

Almost surely, 2^20972686377 is an apocalyptic number.

It is an amenable number.

20972686377 is a deficient number, since it is larger than the sum of its proper divisors (6992564343).

20972686377 is a wasteful number, since it uses less digits than its factorization.

20972686377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417223.

The product of its (nonzero) digits is 10668672, while the sum is 57.

The spelling of 20972686377 in words is "twenty billion, nine hundred seventy-two million, six hundred eighty-six thousand, three hundred seventy-seven".