21910896 has 60 divisors (see below), whose sum is σ = 70083312. Its totient is φ = 6259968.

The previous prime is 21910891. The next prime is 21910937. The reversal of 21910896 is 69801912.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 21910896.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21910891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9861 + ... + 11876.

Almost surely, 2^21910896 is an apocalyptic number.

It is an amenable number.

21910896 is an abundant number, since it is smaller than the sum of its proper divisors (48172416).

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

21910896 is a wasteful number, since it uses less digits than its factorization.

21910896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21758 (or 21749 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 21910896 is about 4680.9076043007. The cubic root of 21910896 is about 279.8251289040.

The spelling of 21910896 in words is "twenty-one million, nine hundred ten thousand, eight hundred ninety-six".