21452494 has 24 divisors (see below), whose sum is σ = 37592640. Its totient is φ = 9154656.

The previous prime is 21452479. The next prime is 21452503. The reversal of 21452494 is 49425412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44547 + ... + 45025.

It is an arithmetic number, because the mean of its divisors is an integer number (1566360).

Almost surely, 2^21452494 is an apocalyptic number.

21452494 is a deficient number, since it is larger than the sum of its proper divisors (16140146).

21452494 is a wasteful number, since it uses less digits than its factorization.

21452494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 945 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 21452494 is about 4631.6837111357. The cubic root of 21452494 is about 277.8599349635.

The spelling of 21452494 in words is "twenty-one million, four hundred fifty-two thousand, four hundred ninety-four".