21134130040 has 32 divisors (see below), whose sum is σ = 50348958480. Its totient is φ = 7956378112.

The previous prime is 21134130019. The next prime is 21134130041. The reversal of 21134130040 is 4003143112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134130041) 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, 15539122 + ... + 15540481.

Almost surely, 2^21134130040 is an apocalyptic number.

21134130040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21134130040 is an abundant number, since it is smaller than the sum of its proper divisors (29214828440).

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

21134130040 is a wasteful number, since it uses less digits than its factorization.

21134130040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31079631 (or 31079627 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21134130040 its reverse (4003143112), we get a palindrome (25137273152).

The spelling of 21134130040 in words is "twenty-one billion, one hundred thirty-four million, one hundred thirty thousand, forty".