20276138 has 16 divisors (see below), whose sum is σ = 32405184. Its totient is φ = 9481920.

The previous prime is 20276131. The next prime is 20276141. The reversal of 20276138 is 83167202.

It is a happy number.

It is a super-2 number, since 2×20276138² = 822243544390088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20276138.

It is not an unprimeable number, because it can be changed into a prime (20276131) 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 7 ways as a sum of consecutive naturals, for example, 3893 + ... + 7463.

It is an arithmetic number, because the mean of its divisors is an integer number (2025324).

Almost surely, 2^20276138 is an apocalyptic number.

20276138 is a deficient number, since it is larger than the sum of its proper divisors (12129046).

20276138 is a wasteful number, since it uses less digits than its factorization.

20276138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3757.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20276138 is about 4502.9032856592. The cubic root of 20276138 is about 272.6853123257.

The spelling of 20276138 in words is "twenty million, two hundred seventy-six thousand, one hundred thirty-eight".