21964022496 has 144 divisors (see below), whose sum is σ = 70805301840. Its totient is φ = 6402447360.

The previous prime is 21964022471. The next prime is 21964022497. The reversal of 21964022496 is 69422046912.

21964022496 is a `hidden beast` number, since 219 + 6 + 402 + 24 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21964022497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83245 + ... + 225516.

It is an arithmetic number, because the mean of its divisors is an integer number (491703485).

Almost surely, 2^21964022496 is an apocalyptic number.

21964022496 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21964022496 is an abundant number, since it is smaller than the sum of its proper divisors (48841279344).

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

21964022496 is a wasteful number, since it uses less digits than its factorization.

21964022496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308809 (or 308798 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 21964022496 in words is "twenty-one billion, nine hundred sixty-four million, twenty-two thousand, four hundred ninety-six".