21377498 has 8 divisors (see below), whose sum is σ = 32208192. Its totient is φ = 10641436.

The previous prime is 21377459. The next prime is 21377501. The reversal of 21377498 is 89477312.

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, 23090 + ... + 23997.

It is an arithmetic number, because the mean of its divisors is an integer number (4026024).

Almost surely, 2^21377498 is an apocalyptic number.

21377498 is a deficient number, since it is larger than the sum of its proper divisors (10830694).

21377498 is a wasteful number, since it uses less digits than its factorization.

21377498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47316.

The product of its digits is 84672, while the sum is 41.

The square root of 21377498 is about 4623.5806470743. The cubic root of 21377498 is about 277.5357657551.

The spelling of 21377498 in words is "twenty-one million, three hundred seventy-seven thousand, four hundred ninety-eight".