20150511738 has 64 divisors (see below), whose sum is σ = 48848873472. Its totient is φ = 5416678080.

The previous prime is 20150511727. The next prime is 20150511743. The reversal of 20150511738 is 83711505102.

It is a junction number, because it is equal to n+sod(n) for n = 20150511699 and 20150511708.

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, 112056 + ... + 229907.

It is an arithmetic number, because the mean of its divisors is an integer number (763263648).

Almost surely, 2^20150511738 is an apocalyptic number.

20150511738 is an abundant number, since it is smaller than the sum of its proper divisors (28698361734).

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

20150511738 is a wasteful number, since it uses less digits than its factorization.

20150511738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342059.

The product of its (nonzero) digits is 8400, while the sum is 33.

The spelling of 20150511738 in words is "twenty billion, one hundred fifty million, five hundred eleven thousand, seven hundred thirty-eight".