21190376 has 16 divisors (see below), whose sum is σ = 40292640. Its totient is φ = 10445680.

The previous prime is 21190349. The next prime is 21190409. The reversal of 21190376 is 67309112.

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, 18086 + ... + 19221.

It is an arithmetic number, because the mean of its divisors is an integer number (2518290).

Almost surely, 2^21190376 is an apocalyptic number.

It is an amenable number.

21190376 is a deficient number, since it is larger than the sum of its proper divisors (19102264).

21190376 is a wasteful number, since it uses less digits than its factorization.

21190376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37384 (or 37380 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 21190376 is about 4603.3005550366. The cubic root of 21190376 is about 276.7236140255.

Adding to 21190376 its reverse (67309112), we get a palindrome (88499488).

The spelling of 21190376 in words is "twenty-one million, one hundred ninety thousand, three hundred seventy-six".