20040015135 has 64 divisors (see below), whose sum is σ = 36927332352. Its totient is φ = 9090754176.

The previous prime is 20040015119. The next prime is 20040015139. The reversal of 20040015135 is 53151004002.

It is not a de Polignac number, because 20040015135 - 2⁴ = 20040015119 is a prime.

It is a super-2 number, since 2×20040015135² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040015139) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8269534 + ... + 8271956.

It is an arithmetic number, because the mean of its divisors is an integer number (576989568).

Almost surely, 2^20040015135 is an apocalyptic number.

20040015135 is a deficient number, since it is larger than the sum of its proper divisors (16887317217).

20040015135 is a wasteful number, since it uses less digits than its factorization.

20040015135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3012.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 20040015135 its reverse (53151004002), we get a palindrome (73191019137).

The spelling of 20040015135 in words is "twenty billion, forty million, fifteen thousand, one hundred thirty-five".