21370802 has 16 divisors (see below), whose sum is σ = 34045272. Its totient is φ = 10026240.

The previous prime is 21370771. The next prime is 21370807. The reversal of 21370802 is 20807312.

It can be written as a sum of positive squares in 4 ways, for example, as 18241441 + 3129361 = 4271^2 + 1769^2 .

It is a super-2 number, since 2×21370802² = 913422356246408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21370807) 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, 13568 + ... + 15060.

Almost surely, 2^21370802 is an apocalyptic number.

21370802 is a deficient number, since it is larger than the sum of its proper divisors (12674470).

21370802 is a wasteful number, since it uses less digits than its factorization.

21370802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 21370802 is about 4622.8564762493. The cubic root of 21370802 is about 277.5067855387.

The spelling of 21370802 in words is "twenty-one million, three hundred seventy thousand, eight hundred two".