20253531077 has 16 divisors (see below), whose sum is σ = 23149748160. Its totient is φ = 17553752832.

The previous prime is 20253531073. The next prime is 20253531079. The reversal of 20253531077 is 77013535202.

It is not a de Polignac number, because 20253531077 - 2² = 20253531073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20253531073) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 16763 + ... + 201960.

It is an arithmetic number, because the mean of its divisors is an integer number (1446859260).

Almost surely, 2^20253531077 is an apocalyptic number.

It is an amenable number.

20253531077 is a deficient number, since it is larger than the sum of its proper divisors (2896217083).

20253531077 is a wasteful number, since it uses less digits than its factorization.

20253531077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219172.

The product of its (nonzero) digits is 44100, while the sum is 35.

The spelling of 20253531077 in words is "twenty billion, two hundred fifty-three million, five hundred thirty-one thousand, seventy-seven".