20379890 has 16 divisors (see below), whose sum is σ = 36911808. Its totient is φ = 8101296.

The previous prime is 20379841. The next prime is 20379899. The reversal of 20379890 is 9897302.

It is not an unprimeable number, because it can be changed into a prime (20379899) 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, 4622 + ... + 7881.

It is an arithmetic number, because the mean of its divisors is an integer number (2306988).

Almost surely, 2^20379890 is an apocalyptic number.

20379890 is a deficient number, since it is larger than the sum of its proper divisors (16531918).

20379890 is a wasteful number, since it uses less digits than its factorization.

20379890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12673.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 20379890 is about 4514.4091529236. The cubic root of 20379890 is about 273.1496270386.

The spelling of 20379890 in words is "twenty million, three hundred seventy-nine thousand, eight hundred ninety".