20253391938 has 48 divisors (see below), whose sum is σ = 47271369600. Its totient is φ = 6230038752.

The previous prime is 20253391937. The next prime is 20253391973. The reversal of 20253391938 is 83919335202.

20253391938 is a `hidden beast` number, since 2 + 0 + 253 + 391 + 9 + 3 + 8 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20253391893 and 20253391902.

It is not an unprimeable number, because it can be changed into a prime (20253391931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 982663 + ... + 1003061.

It is an arithmetic number, because the mean of its divisors is an integer number (984820200).

Almost surely, 2^20253391938 is an apocalyptic number.

20253391938 is an abundant number, since it is smaller than the sum of its proper divisors (27017977662).

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

20253391938 is a wasteful number, since it uses less digits than its factorization.

20253391938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24663 (or 24660 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 20253391938 in words is "twenty billion, two hundred fifty-three million, three hundred ninety-one thousand, nine hundred thirty-eight".