21376494 has 32 divisors (see below), whose sum is σ = 47658240. Its totient is φ = 7102296.

The previous prime is 21376483. The next prime is 21376507. The reversal of 21376494 is 49467312.

21376494 is a `hidden beast` number, since 2 + 1 + 3 + 7 + 649 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26769 + ... + 27555.

It is an arithmetic number, because the mean of its divisors is an integer number (1489320).

Almost surely, 2^21376494 is an apocalyptic number.

21376494 is an abundant number, since it is smaller than the sum of its proper divisors (26281746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21376494 is a wasteful number, since it uses less digits than its factorization.

21376494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301 (or 1295 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 21376494 is about 4623.4720719390. The cubic root of 21376494 is about 277.5314208395.

The spelling of 21376494 in words is "twenty-one million, three hundred seventy-six thousand, four hundred ninety-four".