21196707 has 16 divisors (see below), whose sum is σ = 32831232. Its totient is φ = 11913120.

The previous prime is 21196697. The next prime is 21196711. The reversal of 21196707 is 70769112.

It is not a de Polignac number, because 21196707 - 2⁴ = 21196691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21196787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6993 + ... + 9554.

It is an arithmetic number, because the mean of its divisors is an integer number (2051952).

Almost surely, 2^21196707 is an apocalyptic number.

21196707 is a deficient number, since it is larger than the sum of its proper divisors (11634525).

21196707 is a wasteful number, since it uses less digits than its factorization.

21196707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16618.

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 21196707 is about 4603.9881624522. The cubic root of 21196707 is about 276.7511699744.

The spelling of 21196707 in words is "twenty-one million, one hundred ninety-six thousand, seven hundred seven".