20968090 has 96 divisors (see below), whose sum is σ = 47190528. Its totient is φ = 6652800.

The previous prime is 20968049. The next prime is 20968091. The reversal of 20968090 is 9086902.

It is not an unprimeable number, because it can be changed into a prime (20968091) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 487609 + ... + 487651.

It is an arithmetic number, because the mean of its divisors is an integer number (491568).

Almost surely, 2^20968090 is an apocalyptic number.

20968090 is an abundant number, since it is smaller than the sum of its proper divisors (26222438).

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

20968090 is a wasteful number, since it uses less digits than its factorization.

20968090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 20968090 is about 4579.0927048925. The cubic root of 20968090 is about 275.7526050989.

The spelling of 20968090 in words is "twenty million, nine hundred sixty-eight thousand, ninety".