20399962 has 16 divisors (see below), whose sum is σ = 33451200. Its totient is φ = 9253440.

The previous prime is 20399947. The next prime is 20399969. The reversal of 20399962 is 26999302.

It is not an unprimeable number, because it can be changed into a prime (20399969) 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, 19714 + ... + 20722.

It is an arithmetic number, because the mean of its divisors is an integer number (2090700).

Almost surely, 2^20399962 is an apocalyptic number.

20399962 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20399962 is a deficient number, since it is larger than the sum of its proper divisors (13051238).

20399962 is a wasteful number, since it uses less digits than its factorization.

20399962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 20399962 is about 4516.6317095818. The cubic root of 20399962 is about 273.2392719509.

The spelling of 20399962 in words is "twenty million, three hundred ninety-nine thousand, nine hundred sixty-two".