21093312970 has 16 divisors (see below), whose sum is σ = 37970983008. Its totient is φ = 8436654160.

The previous prime is 21093312959. The next prime is 21093312979. The reversal of 21093312970 is 7921339012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21093312979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59877 + ... + 213943.

It is an arithmetic number, because the mean of its divisors is an integer number (2373186438).

Almost surely, 2^21093312970 is an apocalyptic number.

21093312970 is a deficient number, since it is larger than the sum of its proper divisors (16877670038).

21093312970 is a wasteful number, since it uses less digits than its factorization.

21093312970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167765.

The product of its (nonzero) digits is 20412, while the sum is 37.

The spelling of 21093312970 in words is "twenty-one billion, ninety-three million, three hundred twelve thousand, nine hundred seventy".