20315253742 has 64 divisors (see below), whose sum is σ = 37518888960. Its totient is φ = 8052397056.

The previous prime is 20315253737. The next prime is 20315253779. The reversal of 20315253742 is 24735251302.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 20315253698 and 20315253707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3534523 + ... + 3540265.

It is an arithmetic number, because the mean of its divisors is an integer number (586232640).

Almost surely, 2^20315253742 is an apocalyptic number.

20315253742 is a deficient number, since it is larger than the sum of its proper divisors (17203635218).

20315253742 is a wasteful number, since it uses less digits than its factorization.

20315253742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6025.

The product of its (nonzero) digits is 50400, while the sum is 34.

The spelling of 20315253742 in words is "twenty billion, three hundred fifteen million, two hundred fifty-three thousand, seven hundred forty-two".