21462970 has 32 divisors (see below), whose sum is σ = 41186880. Its totient is φ = 8029440.

The previous prime is 21462941. The next prime is 21462983. The reversal of 21462970 is 7926412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15090 + ... + 16450.

It is an arithmetic number, because the mean of its divisors is an integer number (1287090).

Almost surely, 2^21462970 is an apocalyptic number.

21462970 is a deficient number, since it is larger than the sum of its proper divisors (19723910).

21462970 is a wasteful number, since it uses less digits than its factorization.

21462970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 21462970 is about 4632.8144793419. The cubic root of 21462970 is about 277.9051571644.

The spelling of 21462970 in words is "twenty-one million, four hundred sixty-two thousand, nine hundred seventy".