21132412004 has 24 divisors (see below), whose sum is σ = 40367667648. Its totient is φ = 9599934240.

The previous prime is 21132411991. The next prime is 21132412031. The reversal of 21132412004 is 40021423112.

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, 67352 + ... + 216335.

It is an arithmetic number, because the mean of its divisors is an integer number (1681986152).

Almost surely, 2^21132412004 is an apocalyptic number.

It is an amenable number.

21132412004 is a deficient number, since it is larger than the sum of its proper divisors (19235255644).

21132412004 is a wasteful number, since it uses less digits than its factorization.

21132412004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285395 (or 285393 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21132412004 its reverse (40021423112), we get a palindrome (61153835116).

The spelling of 21132412004 in words is "twenty-one billion, one hundred thirty-two million, four hundred twelve thousand, four".