21022911324 has 36 divisors (see below), whose sum is σ = 53148298840. Its totient is φ = 7006707360.

The previous prime is 21022911313. The next prime is 21022911347. The reversal of 21022911324 is 42311922012.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270087 + ... + 339105.

Almost surely, 2^21022911324 is an apocalyptic number.

It is an amenable number.

21022911324 is an abundant number, since it is smaller than the sum of its proper divisors (32125387516).

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

21022911324 is a wasteful number, since it uses less digits than its factorization.

21022911324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77490 (or 77485 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 21022911324 in words is "twenty-one billion, twenty-two million, nine hundred eleven thousand, three hundred twenty-four".