20430231561958 has 32 divisors (see below), whose sum is σ = 33139047037824. Its totient is φ = 9409484347392.

The previous prime is 20430231561953. The next prime is 20430231561959. The reversal of 20430231561958 is 85916513203402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430231561953) 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, 114124416 + ... + 114303292.

It is an arithmetic number, because the mean of its divisors is an integer number (1035595219932).

Almost surely, 2^{20430231561958} is an apocalyptic number.

20430231561958 is a deficient number, since it is larger than the sum of its proper divisors (12708815475866).

20430231561958 is a wasteful number, since it uses less digits than its factorization.

20430231561958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250416.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 20430231561958 in words is "twenty trillion, four hundred thirty billion, two hundred thirty-one million, five hundred sixty-one thousand, nine hundred fifty-eight".