21970474 has 8 divisors (see below), whose sum is σ = 34388640. Its totient is φ = 10507596.

The previous prime is 21970469. The next prime is 21970493. The reversal of 21970474 is 47407912.

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, 238764 + ... + 238855.

It is an arithmetic number, because the mean of its divisors is an integer number (4298580).

Almost surely, 2^21970474 is an apocalyptic number.

21970474 is a deficient number, since it is larger than the sum of its proper divisors (12418166).

21970474 is a wasteful number, since it uses less digits than its factorization.

21970474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477644.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 21970474 is about 4687.2672208868. The cubic root of 21970474 is about 280.0785238949.

The spelling of 21970474 in words is "twenty-one million, nine hundred seventy thousand, four hundred seventy-four".