20230990 has 24 divisors (see below), whose sum is σ = 39435768. Its totient is φ = 7469280.

The previous prime is 20230981. The next prime is 20230997. The reversal of 20230990 is 9903202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20230997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4296 + ... + 7675.

It is an arithmetic number, because the mean of its divisors is an integer number (1643157).

Almost surely, 2^20230990 is an apocalyptic number.

20230990 is a deficient number, since it is larger than the sum of its proper divisors (19204778).

20230990 is a wasteful number, since it uses less digits than its factorization.

20230990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12004 (or 11991 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 20230990 is about 4497.8872818247. The cubic root of 20230990 is about 272.4827697211.

The spelling of 20230990 in words is "twenty million, two hundred thirty thousand, nine hundred ninety".