20436582531025 has 12 divisors (see below), whose sum is σ = 26158825640704. Its totient is φ = 15821870346000.

The previous prime is 20436582531019. The next prime is 20436582531037. The reversal of 20436582531025 is 52013528563402.

It is a de Polignac number, because none of the positive numbers 2^k-20436582531025 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13184891181 + ... + 13184892730.

Almost surely, 2^{20436582531025} is an apocalyptic number.

20436582531025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20436582531025 is a deficient number, since it is larger than the sum of its proper divisors (5722243109679).

20436582531025 is a wasteful number, since it uses less digits than its factorization.

20436582531025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26369783952 (or 26369783947 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 46.

The spelling of 20436582531025 in words is "twenty trillion, four hundred thirty-six billion, five hundred eighty-two million, five hundred thirty-one thousand, twenty-five".