20407875837 has 4 divisors (see below), whose sum is σ = 27210501120. Its totient is φ = 13605250556.

The previous prime is 20407875821. The next prime is 20407875847. The reversal of 20407875837 is 73857870402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20407875837 - 2⁴ = 20407875821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20407875837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20407875847) 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 3 ways as a sum of consecutive naturals, for example, 3401312637 + ... + 3401312642.

It is an arithmetic number, because the mean of its divisors is an integer number (6802625280).

Almost surely, 2^20407875837 is an apocalyptic number.

It is an amenable number.

20407875837 is a deficient number, since it is larger than the sum of its proper divisors (6802625283).

20407875837 is an equidigital number, since it uses as much as digits as its factorization.

20407875837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6802625282.

The product of its (nonzero) digits is 2634240, while the sum is 51.

The spelling of 20407875837 in words is "twenty billion, four hundred seven million, eight hundred seventy-five thousand, eight hundred thirty-seven".