21370701 has 16 divisors (see below), whose sum is σ = 31199040. Its totient is φ = 12904320.

The previous prime is 21370693. The next prime is 21370721. The reversal of 21370701 is 10707312.

It is not a de Polignac number, because 21370701 - 2³ = 21370693 is a prime.

It is a super-2 number, since 2×21370701² = 913413722462802, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21370721) 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, 9295 + ... + 11363.

It is an arithmetic number, because the mean of its divisors is an integer number (1949940).

Almost surely, 2^21370701 is an apocalyptic number.

It is an amenable number.

21370701 is a deficient number, since it is larger than the sum of its proper divisors (9828339).

21370701 is a wasteful number, since it uses less digits than its factorization.

21370701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396.

The product of its (nonzero) digits is 294, while the sum is 21.

The square root of 21370701 is about 4622.8455522546. The cubic root of 21370701 is about 277.5063483654.

The spelling of 21370701 in words is "twenty-one million, three hundred seventy thousand, seven hundred one".