20152053138 has 16 divisors (see below), whose sum is σ = 46061835840. Its totient is φ = 5757729456.

The previous prime is 20152053133. The next prime is 20152053139. The reversal of 20152053138 is 83135025102.

It is a super-2 number, since 2×20152053138² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20152053133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239905353 + ... + 239905436.

It is an arithmetic number, because the mean of its divisors is an integer number (2878864740).

Almost surely, 2^20152053138 is an apocalyptic number.

20152053138 is an abundant number, since it is smaller than the sum of its proper divisors (25909782702).

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

20152053138 is a wasteful number, since it uses less digits than its factorization.

20152053138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479810801.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 20152053138 in words is "twenty billion, one hundred fifty-two million, fifty-three thousand, one hundred thirty-eight".