20407877553 has 12 divisors (see below), whose sum is σ = 31653034800. Its totient is φ = 11661644232.

The previous prime is 20407877537. The next prime is 20407877563. The reversal of 20407877553 is 35577870402.

It is not a de Polignac number, because 20407877553 - 2⁴ = 20407877537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20407877513) 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 11 ways as a sum of consecutive naturals, for example, 69414403 + ... + 69414696.

It is an arithmetic number, because the mean of its divisors is an integer number (2637752900).

Almost surely, 2^20407877553 is an apocalyptic number.

It is an amenable number.

20407877553 is a deficient number, since it is larger than the sum of its proper divisors (11245157247).

20407877553 is a wasteful number, since it uses less digits than its factorization.

20407877553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138829116 (or 138829109 counting only the distinct ones).

The product of its (nonzero) digits is 1646400, while the sum is 48.

The spelling of 20407877553 in words is "twenty billion, four hundred seven million, eight hundred seventy-seven thousand, five hundred fifty-three".