21132042013 has 8 divisors (see below), whose sum is σ = 21225849120. Its totient is φ = 21038348400.

The previous prime is 21132041999. The next prime is 21132042023. The reversal of 21132042013 is 31024023112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21132042013 - 2³³ = 12542107421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132042023) 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, 356338 + ... + 411388.

It is an arithmetic number, because the mean of its divisors is an integer number (2653231140).

Almost surely, 2^21132042013 is an apocalyptic number.

It is an amenable number.

21132042013 is a deficient number, since it is larger than the sum of its proper divisors (93807107).

21132042013 is a wasteful number, since it uses less digits than its factorization.

21132042013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56747.

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

Adding to 21132042013 its reverse (31024023112), we get a palindrome (52156065125).

The spelling of 21132042013 in words is "twenty-one billion, one hundred thirty-two million, forty-two thousand, thirteen".