20530402994 has 16 divisors (see below), whose sum is σ = 32443135200. Its totient is φ = 9716914944.

The previous prime is 20530402987. The next prime is 20530403087. The reversal of 20530402994 is 49920403502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175724 + ... + 268215.

It is an arithmetic number, because the mean of its divisors is an integer number (2027695950).

Almost surely, 2^20530402994 is an apocalyptic number.

20530402994 is a deficient number, since it is larger than the sum of its proper divisors (11912732206).

20530402994 is a wasteful number, since it uses less digits than its factorization.

20530402994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445177.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 20530402994 in words is "twenty billion, five hundred thirty million, four hundred two thousand, nine hundred ninety-four".