21692070 has 32 divisors (see below), whose sum is σ = 57846240. Its totient is φ = 5784480.

The previous prime is 21692063. The next prime is 21692071. The reversal of 21692070 is 7029612.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21692071) 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, 39901 + ... + 40440.

It is an arithmetic number, because the mean of its divisors is an integer number (1807695).

Almost surely, 2^21692070 is an apocalyptic number.

21692070 is an abundant number, since it is smaller than the sum of its proper divisors (36154170).

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

21692070 is a wasteful number, since it uses less digits than its factorization.

21692070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80357 (or 80351 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 21692070 is about 4657.4746376121. The cubic root of 21692070 is about 278.8904645751.

The spelling of 21692070 in words is "twenty-one million, six hundred ninety-two thousand, seventy".