20535489192100 has 27 divisors (see below), whose sum is σ = 44562109883011. Its totient is φ = 8214177550400.

The previous prime is 20535489192083. The next prime is 20535489192151. The reversal of 20535489192100 is 129198453502.

The square root of 20535489192100 is 4531610.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 3344780107876 + 17190709084224 = 1828874^2 + 4146168^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 45089520 + ... + 45542680.

Almost surely, 2^{20535489192100} is an apocalyptic number.

20535489192100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

20535489192100 is the 4531610-th square number.

It is an amenable number.

20535489192100 is an abundant number, since it is smaller than the sum of its proper divisors (24026620690911).

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

20535489192100 is an frugal number, since it uses more digits than its factorization.

20535489192100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906336 (or 453168 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 20535489192100 in words is "twenty trillion, five hundred thirty-five billion, four hundred eighty-nine million, one hundred ninety-two thousand, one hundred".