20523855090 has 32 divisors (see below), whose sum is σ = 49265910720. Its totient is φ = 5472065984.

The previous prime is 20523855067. The next prime is 20523855103. The reversal of 20523855090 is 9055832502.

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, 122476 + ... + 236744.

It is an arithmetic number, because the mean of its divisors is an integer number (1539559710).

Almost surely, 2^20523855090 is an apocalyptic number.

20523855090 is an abundant number, since it is smaller than the sum of its proper divisors (28742055630).

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

20523855090 is a wasteful number, since it uses less digits than its factorization.

20523855090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120266.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 20523855090 in words is "twenty billion, five hundred twenty-three million, eight hundred fifty-five thousand, ninety".