21974102 has 8 divisors (see below), whose sum is σ = 34024512. Its totient is φ = 10632600.

The previous prime is 21974077. The next prime is 21974107. The reversal of 21974102 is 20147912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21974102² = 965722317412808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21974107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177149 + ... + 177272.

It is an arithmetic number, because the mean of its divisors is an integer number (4253064).

Almost surely, 2^21974102 is an apocalyptic number.

21974102 is a deficient number, since it is larger than the sum of its proper divisors (12050410).

21974102 is a wasteful number, since it uses less digits than its factorization.

21974102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354454.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 21974102 is about 4687.6542107967. The cubic root of 21974102 is about 280.0939395683.

The spelling of 21974102 in words is "twenty-one million, nine hundred seventy-four thousand, one hundred two".