20635645522 has 8 divisors (see below), whose sum is σ = 31259938572. Its totient is φ = 10215666000.

The previous prime is 20635645469. The next prime is 20635645529. The reversal of 20635645522 is 22554653602.

It can be written as a sum of positive squares in 2 ways, for example, as 20635609801 + 35721 = 143651^2 + 189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20635645522² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20635645529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51078129 + ... + 51078532.

Almost surely, 2^20635645522 is an apocalyptic number.

20635645522 is a deficient number, since it is larger than the sum of its proper divisors (10624293050).

20635645522 is a wasteful number, since it uses less digits than its factorization.

20635645522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102156764.

The product of its (nonzero) digits is 432000, while the sum is 40.

The spelling of 20635645522 in words is "twenty billion, six hundred thirty-five million, six hundred forty-five thousand, five hundred twenty-two".