20431054242 has 24 divisors (see below), whose sum is σ = 44321899440. Its totient is φ = 6801949080.

The previous prime is 20431054211. The next prime is 20431054279. The reversal of 20431054242 is 24245013402.

20431054242 is a `hidden beast` number, since 204 + 31 + 0 + 5 + 424 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 685192 + ... + 714387.

It is an arithmetic number, because the mean of its divisors is an integer number (1846745810).

Almost surely, 2^20431054242 is an apocalyptic number.

20431054242 is an abundant number, since it is smaller than the sum of its proper divisors (23890845198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20431054242 is a wasteful number, since it uses less digits than its factorization.

20431054242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400398 (or 1400395 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 20431054242 its reverse (24245013402), we get a palindrome (44676067644).

The spelling of 20431054242 in words is "twenty billion, four hundred thirty-one million, fifty-four thousand, two hundred forty-two".