20523800433 has 32 divisors (see below), whose sum is σ = 28412550144. Its totient is φ = 13167306432.

The previous prime is 20523800431. The next prime is 20523800441. The reversal of 20523800433 is 33400832502.

It is not a de Polignac number, because 20523800433 - 2¹ = 20523800431 is a prime.

It is a super-2 number, since 2×20523800433² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20523800433.

It is not an unprimeable number, because it can be changed into a prime (20523800431) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 11484166 + ... + 11485952.

It is an arithmetic number, because the mean of its divisors is an integer number (887892192).

Almost surely, 2^20523800433 is an apocalyptic number.

It is an amenable number.

20523800433 is a deficient number, since it is larger than the sum of its proper divisors (7888749711).

20523800433 is a wasteful number, since it uses less digits than its factorization.

20523800433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901.

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 20523800433 in words is "twenty billion, five hundred twenty-three million, eight hundred thousand, four hundred thirty-three".