21974954 has 4 divisors (see below), whose sum is σ = 32962434. Its totient is φ = 10987476.

The previous prime is 21974951. The next prime is 21974957. The reversal of 21974954 is 45947912.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21974951) and next prime (21974957).

It can be written as a sum of positive squares in only one way, i.e., 17833729 + 4141225 = 4223^2 + 2035^2 .

It is not an unprimeable number, because it can be changed into a prime (21974951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5493737 + ... + 5493740.

Almost surely, 2^21974954 is an apocalyptic number.

21974954 is a deficient number, since it is larger than the sum of its proper divisors (10987480).

21974954 is a wasteful number, since it uses less digits than its factorization.

21974954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10987479.

The product of its digits is 90720, while the sum is 41.

The square root of 21974954 is about 4687.7450869261. The cubic root of 21974954 is about 280.0975595411.

The spelling of 21974954 in words is "twenty-one million, nine hundred seventy-four thousand, nine hundred fifty-four".