20151534442 has 64 divisors (see below), whose sum is σ = 34673546880. Its totient is φ = 8714974464.

The previous prime is 20151534437. The next prime is 20151534461. The reversal of 20151534442 is 24443515102.

It is a super-2 number, since 2×20151534442² (a number of 21 digits) contains 22 as substring.

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, 15705933 + ... + 15707215.

It is an arithmetic number, because the mean of its divisors is an integer number (541774170).

Almost surely, 2^20151534442 is an apocalyptic number.

20151534442 is a deficient number, since it is larger than the sum of its proper divisors (14522012438).

20151534442 is a wasteful number, since it uses less digits than its factorization.

20151534442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 20151534442 in words is "twenty billion, one hundred fifty-one million, five hundred thirty-four thousand, four hundred forty-two".