20079870 has 16 divisors (see below), whose sum is σ = 48191760. Its totient is φ = 5354624.

The previous prime is 20079869. The next prime is 20079887. The reversal of 20079870 is 7897002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334635 + ... + 334694.

It is an arithmetic number, because the mean of its divisors is an integer number (3011985).

Almost surely, 2^20079870 is an apocalyptic number.

20079870 is an abundant number, since it is smaller than the sum of its proper divisors (28111890).

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

20079870 is a wasteful number, since it uses less digits than its factorization.

20079870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669339.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 20079870 is about 4481.0567949983. The cubic root of 20079870 is about 271.8026159528.

The spelling of 20079870 in words is "twenty million, seventy-nine thousand, eight hundred seventy".