21968058 has 16 divisors (see below), whose sum is σ = 50212800. Its totient is φ = 6276576.

The previous prime is 21968053. The next prime is 21968069. The reversal of 21968058 is 85086912.

It is a super-3 number, since 3×21968058³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21968053) 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, 261483 + ... + 261566.

It is an arithmetic number, because the mean of its divisors is an integer number (3138300).

Almost surely, 2^21968058 is an apocalyptic number.

21968058 is an abundant number, since it is smaller than the sum of its proper divisors (28244742).

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

21968058 is a wasteful number, since it uses less digits than its factorization.

21968058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523061.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 21968058 is about 4687.0094943364. The cubic root of 21968058 is about 280.0682571687.

The spelling of 21968058 in words is "twenty-one million, nine hundred sixty-eight thousand, fifty-eight".