20750758090 has 12 divisors (see below), whose sum is σ = 37352184534. Its totient is φ = 8300121024.

The previous prime is 20750758087. The next prime is 20750758099. The reversal of 20750758090 is 9085705702.

It can be written as a sum of positive squares in 3 ways, for example, as 20153493369 + 597264721 = 141963^2 + 24439^2 .

It is a super-2 number, since 2×20750758090² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20750758099) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 432754 + ... + 478306.

Almost surely, 2^20750758090 is an apocalyptic number.

20750758090 is a deficient number, since it is larger than the sum of its proper divisors (16601426444).

20750758090 is an frugal number, since it uses more digits than its factorization.

20750758090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91113 (or 45560 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 20750758090 in words is "twenty billion, seven hundred fifty million, seven hundred fifty-eight thousand, ninety".