21197702 has 16 divisors (see below), whose sum is σ = 32365872. Its totient is φ = 10410720.

The previous prime is 21197699. The next prime is 21197731. The reversal of 21197702 is 20779112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45752 + ... + 46212.

It is an arithmetic number, because the mean of its divisors is an integer number (2022867).

Almost surely, 2^21197702 is an apocalyptic number.

21197702 is a deficient number, since it is larger than the sum of its proper divisors (11168170).

21197702 is a wasteful number, since it uses less digits than its factorization.

21197702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 21197702 is about 4604.0962196722. The cubic root of 21197702 is about 276.7555002556.

The spelling of 21197702 in words is "twenty-one million, one hundred ninety-seven thousand, seven hundred two".