21250954 has 8 divisors (see below), whose sum is σ = 32205348. Its totient is φ = 10515840.

The previous prime is 21250877. The next prime is 21250961. The reversal of 21250954 is 45905212.

It can be written as a sum of positive squares in 2 ways, for example, as 20007729 + 1243225 = 4473^2 + 1115^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54577 + ... + 54964.

Almost surely, 2^21250954 is an apocalyptic number.

21250954 is a deficient number, since it is larger than the sum of its proper divisors (10954394).

21250954 is a wasteful number, since it uses less digits than its factorization.

21250954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109640.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 21250954 is about 4609.8757033135. The cubic root of 21250954 is about 276.9870577435.

The spelling of 21250954 in words is "twenty-one million, two hundred fifty thousand, nine hundred fifty-four".