20370390761 has 16 divisors (see below), whose sum is σ = 23667557760. Its totient is φ = 17170876800.

The previous prime is 20370390739. The next prime is 20370390767. The reversal of 20370390761 is 16709307302.

It is not a de Polignac number, because 20370390761 - 2²² = 20366196457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20370390767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245735 + ... + 318003.

It is an arithmetic number, because the mean of its divisors is an integer number (1479222360).

Almost surely, 2^20370390761 is an apocalyptic number.

It is an amenable number.

20370390761 is a deficient number, since it is larger than the sum of its proper divisors (3297166999).

20370390761 is an equidigital number, since it uses as much as digits as its factorization.

20370390761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72944.

The product of its (nonzero) digits is 47628, while the sum is 38.

The spelling of 20370390761 in words is "twenty billion, three hundred seventy million, three hundred ninety thousand, seven hundred sixty-one".