20504770356216 has 16 divisors (see below), whose sum is σ = 51261925890600. Its totient is φ = 6834923452064.

The previous prime is 20504770356199. The next prime is 20504770356223. The reversal of 20504770356216 is 61265307740502.

It is a super-2 number, since 2×20504770356216² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427182715731 + ... + 427182715778.

Almost surely, 2^{20504770356216} is an apocalyptic number.

It is an amenable number.

20504770356216 is an abundant number, since it is smaller than the sum of its proper divisors (30757155534384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20504770356216 is a wasteful number, since it uses less digits than its factorization.

20504770356216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854365431518 (or 854365431514 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 48.

The spelling of 20504770356216 in words is "twenty trillion, five hundred four billion, seven hundred seventy million, three hundred fifty-six thousand, two hundred sixteen".