21920496 has 40 divisors (see below), whose sum is σ = 60985680. Its totient is φ = 6744576.

The previous prime is 21920473. The next prime is 21920501. The reversal of 21920496 is 69402912.

It is a congruent number.

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, 16941 + ... + 18188.

It is an arithmetic number, because the mean of its divisors is an integer number (1524642).

Almost surely, 2^21920496 is an apocalyptic number.

21920496 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21920496 is an abundant number, since it is smaller than the sum of its proper divisors (39065184).

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

21920496 is a wasteful number, since it uses less digits than its factorization.

21920496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35153 (or 35147 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 21920496 is about 4681.9329341630. The cubic root of 21920496 is about 279.8659902941.

The spelling of 21920496 in words is "twenty-one million, nine hundred twenty thousand, four hundred ninety-six".