21132404366 has 16 divisors (see below), whose sum is σ = 31830986880. Its totient is φ = 10522122240.

The previous prime is 21132404351. The next prime is 21132404431. The reversal of 21132404366 is 66340423112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 977870 + ... + 999246.

It is an arithmetic number, because the mean of its divisors is an integer number (1989436680).

Almost surely, 2^21132404366 is an apocalyptic number.

21132404366 is a deficient number, since it is larger than the sum of its proper divisors (10698582514).

21132404366 is a wasteful number, since it uses less digits than its factorization.

21132404366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23419.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 21132404366 its reverse (66340423112), we get a palindrome (87472827478).

The spelling of 21132404366 in words is "twenty-one billion, one hundred thirty-two million, four hundred four thousand, three hundred sixty-six".