20119990 has 32 divisors (see below), whose sum is σ = 39701664. Its totient is φ = 7280640.

The previous prime is 20119987. The next prime is 20119991. The reversal of 20119990 is 9991102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20119991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34582 + ... + 35158.

It is an arithmetic number, because the mean of its divisors is an integer number (1240677).

Almost surely, 2^20119990 is an apocalyptic number.

20119990 is a deficient number, since it is larger than the sum of its proper divisors (19581674).

20119990 is a wasteful number, since it uses less digits than its factorization.

20119990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 20119990 is about 4485.5311837061. The cubic root of 20119990 is about 271.9835179603.

The spelling of 20119990 in words is "twenty million, one hundred nineteen thousand, nine hundred ninety".