20573541690 has 32 divisors (see below), whose sum is σ = 53174693376. Its totient is φ = 5064256320.

The previous prime is 20573541647. The next prime is 20573541721. The reversal of 20573541690 is 9614537502.

It is a super-2 number, since 2×20573541690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26375946 + ... + 26376725.

It is an arithmetic number, because the mean of its divisors is an integer number (1661709168).

Almost surely, 2^20573541690 is an apocalyptic number.

20573541690 is an abundant number, since it is smaller than the sum of its proper divisors (32601151686).

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

20573541690 is a wasteful number, since it uses less digits than its factorization.

20573541690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52752694.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 20573541690 in words is "twenty billion, five hundred seventy-three million, five hundred forty-one thousand, six hundred ninety".