21074670 has 48 divisors (see below), whose sum is σ = 57182112. Its totient is φ = 5375040.

The previous prime is 21074657. The next prime is 21074681. The reversal of 21074670 is 7647012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3021 + ... + 7160.

It is an arithmetic number, because the mean of its divisors is an integer number (1191294).

Almost surely, 2^21074670 is an apocalyptic number.

21074670 is an abundant number, since it is smaller than the sum of its proper divisors (36107442).

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

21074670 is a wasteful number, since it uses less digits than its factorization.

21074670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10217 (or 10214 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 21074670 is about 4590.7156304873. The cubic root of 21074670 is about 276.2190290348.

The spelling of 21074670 in words is "twenty-one million, seventy-four thousand, six hundred seventy".