21985096 has 32 divisors (see below), whose sum is σ = 48119040. Its totient is φ = 9220608.

The previous prime is 21985091. The next prime is 21985127. The reversal of 21985096 is 69058912.

It is a super-2 number, since 2×21985096² = 966688892258432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21985091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1545 + ... + 6808.

It is an arithmetic number, because the mean of its divisors is an integer number (1503720).

Almost surely, 2^21985096 is an apocalyptic number.

It is an amenable number.

21985096 is an abundant number, since it is smaller than the sum of its proper divisors (26133944).

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

21985096 is a wasteful number, since it uses less digits than its factorization.

21985096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8413 (or 8409 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 21985096 is about 4688.8267189138. The cubic root of 21985096 is about 280.1406436288.

The spelling of 21985096 in words is "twenty-one million, nine hundred eighty-five thousand, ninety-six".