21994876 has 24 divisors (see below), whose sum is σ = 40158720. Its totient is φ = 10527552.

The previous prime is 21994867. The next prime is 21994897. The reversal of 21994876 is 67849912.

21994876 = T₁₃₁ + T₁₃₂ + ... + T₅₁₁.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13986 + ... + 15478.

It is an arithmetic number, because the mean of its divisors is an integer number (1673280).

Almost surely, 2^21994876 is an apocalyptic number.

It is an amenable number.

21994876 is a deficient number, since it is larger than the sum of its proper divisors (18163844).

21994876 is a wasteful number, since it uses less digits than its factorization.

21994876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653 (or 1651 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 21994876 is about 4689.8695077795. The cubic root of 21994876 is about 280.1821773620.

The spelling of 21994876 in words is "twenty-one million, nine hundred ninety-four thousand, eight hundred seventy-six".