21370698 has 12 divisors (see below), whose sum is σ = 46303218. Its totient is φ = 7123560.

The previous prime is 21370693. The next prime is 21370721. The reversal of 21370698 is 89607312.

It can be written as a sum of positive squares in only one way, i.e., 19474569 + 1896129 = 4413^2 + 1377^2 .

It is not an unprimeable number, because it can be changed into a prime (21370693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 593613 + ... + 593648.

Almost surely, 2^21370698 is an apocalyptic number.

21370698 is an abundant number, since it is smaller than the sum of its proper divisors (24932520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21370698 is a wasteful number, since it uses less digits than its factorization.

21370698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187269 (or 1187266 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 21370698 is about 4622.8452277791. The cubic root of 21370698 is about 277.5063353801.

The spelling of 21370698 in words is "twenty-one million, three hundred seventy thousand, six hundred ninety-eight".