20477774307231 has 16 divisors (see below), whose sum is σ = 30338415187200. Its totient is φ = 13651412242104.

The previous prime is 20477774307229. The next prime is 20477774307239. The reversal of 20477774307231 is 13270347777402.

20477774307231 is a `hidden beast` number, since 2 + 0 + 4 + 77 + 77 + 430 + 72 + 3 + 1 = 666.

It is not a de Polignac number, because 20477774307231 - 2¹ = 20477774307229 is a prime.

It is a super-2 number, since 2×20477774307231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20477774307239) 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, 11287491 + ... + 12975476.

It is an arithmetic number, because the mean of its divisors is an integer number (1896150949200).

Almost surely, 2^{20477774307231} is an apocalyptic number.

20477774307231 is a deficient number, since it is larger than the sum of its proper divisors (9860640879969).

20477774307231 is a wasteful number, since it uses less digits than its factorization.

20477774307231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24294235 (or 24294229 counting only the distinct ones).

The product of its (nonzero) digits is 9680832, while the sum is 54.

The spelling of 20477774307231 in words is "twenty trillion, four hundred seventy-seven billion, seven hundred seventy-four million, three hundred seven thousand, two hundred thirty-one".