20152797474 has 32 divisors (see below), whose sum is σ = 42012801216. Its totient is φ = 6438484800.

The previous prime is 20152797473. The next prime is 20152797493. The reversal of 20152797474 is 47479725102.

It is a super-2 number, since 2×20152797474² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20152797473) 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, 662577 + ... + 692324.

It is an arithmetic number, because the mean of its divisors is an integer number (1312900038).

Almost surely, 2^20152797474 is an apocalyptic number.

20152797474 is an abundant number, since it is smaller than the sum of its proper divisors (21860003742).

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

20152797474 is a wasteful number, since it uses less digits than its factorization.

20152797474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355010.

The product of its (nonzero) digits is 987840, while the sum is 48.

The spelling of 20152797474 in words is "twenty billion, one hundred fifty-two million, seven hundred ninety-seven thousand, four hundred seventy-four".