20999269924 has 96 divisors (see below), whose sum is σ = 41699266560. Its totient is φ = 9200486400.

The previous prime is 20999269909. The next prime is 20999269931. The reversal of 20999269924 is 42996299902.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26347494 + ... + 26348290.

It is an arithmetic number, because the mean of its divisors is an integer number (434367360).

Almost surely, 2^20999269924 is an apocalyptic number.

It is an amenable number.

20999269924 is a deficient number, since it is larger than the sum of its proper divisors (20699996636).

20999269924 is a wasteful number, since it uses less digits than its factorization.

20999269924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309 (or 1307 counting only the distinct ones).

The product of its (nonzero) digits is 11337408, while the sum is 61.

The spelling of 20999269924 in words is "twenty billion, nine hundred ninety-nine million, two hundred sixty-nine thousand, nine hundred twenty-four".