21790962 has 12 divisors (see below), whose sum is σ = 47213790. Its totient is φ = 7263648.

The previous prime is 21790949. The next prime is 21790973. The reversal of 21790962 is 26909712.

It can be written as a sum of positive squares in only one way, i.e., 21706281 + 84681 = 4659^2 + 291^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 605287 + ... + 605322.

Almost surely, 2^21790962 is an apocalyptic number.

21790962 is an abundant number, since it is smaller than the sum of its proper divisors (25422828).

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

21790962 is a wasteful number, since it uses less digits than its factorization.

21790962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210617 (or 1210614 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 21790962 is about 4668.0790481739. The cubic root of 21790962 is about 279.3136335043.

The spelling of 21790962 in words is "twenty-one million, seven hundred ninety thousand, nine hundred sixty-two".