21013421032 has 32 divisors (see below), whose sum is σ = 42153775200. Its totient is φ = 9790545600.

The previous prime is 21013421027. The next prime is 21013421057. The reversal of 21013421032 is 23012431012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

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, 1123894 + ... + 1142437.

It is an arithmetic number, because the mean of its divisors is an integer number (1317305475).

Almost surely, 2^21013421032 is an apocalyptic number.

It is an amenable number.

21013421032 is an abundant number, since it is smaller than the sum of its proper divisors (21140354168).

21013421032 is a wasteful number, since it uses less digits than its factorization.

21013421032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266417 (or 2266413 counting only the distinct ones).

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

Adding to 21013421032 its reverse (23012431012), we get a palindrome (44025852044).

The spelling of 21013421032 in words is "twenty-one billion, thirteen million, four hundred twenty-one thousand, thirty-two".