21970300 has 36 divisors (see below), whose sum is σ = 52012296. Its totient is φ = 7988800.

The previous prime is 21970297. The next prime is 21970303. The reversal of 21970300 is 307912.

It is an interprime number because it is at equal distance from previous prime (21970297) and next prime (21970303).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21970303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8887 + ... + 11086.

It is an arithmetic number, because the mean of its divisors is an integer number (1444786).

Almost surely, 2^21970300 is an apocalyptic number.

21970300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21970300 is an abundant number, since it is smaller than the sum of its proper divisors (30041996).

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

21970300 is a wasteful number, since it uses less digits than its factorization.

21970300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19998 (or 19991 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 21970300 is about 4687.2486599283. The cubic root of 21970300 is about 280.0777845118.

The spelling of 21970300 in words is "twenty-one million, nine hundred seventy thousand, three hundred".