20260138 has 16 divisors (see below), whose sum is σ = 31458240. Its totient is φ = 9779616.

The previous prime is 20260117. The next prime is 20260159. The reversal of 20260138 is 83106202.

It is an interprime number because it is at equal distance from previous prime (20260117) and next prime (20260159).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6331 + ... + 8977.

It is an arithmetic number, because the mean of its divisors is an integer number (1966140).

Almost surely, 2^20260138 is an apocalyptic number.

20260138 is a deficient number, since it is larger than the sum of its proper divisors (11198102).

20260138 is a wasteful number, since it uses less digits than its factorization.

20260138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20260138 is about 4501.1263034934. The cubic root of 20260138 is about 272.6135676783.

The spelling of 20260138 in words is "twenty million, two hundred sixty thousand, one hundred thirty-eight".