20777914157 has 16 divisors (see below), whose sum is σ = 27897620352. Its totient is φ = 14945152320.

The previous prime is 20777914147. The next prime is 20777914163. The reversal of 20777914157 is 75141977702.

It is not a de Polignac number, because 20777914157 - 2⁴ = 20777914141 is a prime.

It is a super-2 number, since 2×20777914157² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20777914147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10377578 + ... + 10379579.

It is an arithmetic number, because the mean of its divisors is an integer number (1743601272).

Almost surely, 2^20777914157 is an apocalyptic number.

It is an amenable number.

20777914157 is a deficient number, since it is larger than the sum of its proper divisors (7119706195).

20777914157 is a wasteful number, since it uses less digits than its factorization.

20777914157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20757188.

The product of its (nonzero) digits is 864360, while the sum is 50.

The spelling of 20777914157 in words is "twenty billion, seven hundred seventy-seven million, nine hundred fourteen thousand, one hundred fifty-seven".