20199970 has 16 divisors (see below), whose sum is σ = 41554368. Its totient is φ = 6925680.

The previous prime is 20199953. The next prime is 20199973. The reversal of 20199970 is 7999102.

It is not an unprimeable number, because it can be changed into a prime (20199973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144216 + ... + 144355.

It is an arithmetic number, because the mean of its divisors is an integer number (2597148).

Almost surely, 2^20199970 is an apocalyptic number.

20199970 is an abundant number, since it is smaller than the sum of its proper divisors (21354398).

20199970 is a wasteful number, since it uses less digits than its factorization.

20199970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288585.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 20199970 is about 4494.4376733914. The cubic root of 20199970 is about 272.3434333333.

The spelling of 20199970 in words is "twenty million, one hundred ninety-nine thousand, nine hundred seventy".