20512307539258 has 32 divisors (see below), whose sum is σ = 31130105086080. Its totient is φ = 10136015922240.

The previous prime is 20512307539253. The next prime is 20512307539289. The reversal of 20512307539258 is 85293570321502.

It is a super-2 number, since 2×20512307539258² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20512307539253) 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, 814323328 + ... + 814348516.

It is an arithmetic number, because the mean of its divisors is an integer number (972815783940).

Almost surely, 2^{20512307539258} is an apocalyptic number.

20512307539258 is a deficient number, since it is larger than the sum of its proper divisors (10617797546822).

20512307539258 is a wasteful number, since it uses less digits than its factorization.

20512307539258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33142.

The product of its (nonzero) digits is 4536000, while the sum is 52.

The spelling of 20512307539258 in words is "twenty trillion, five hundred twelve billion, three hundred seven million, five hundred thirty-nine thousand, two hundred fifty-eight".