20876938 has 4 divisors (see below), whose sum is σ = 31315410. Its totient is φ = 10438468.

The previous prime is 20876929. The next prime is 20876951. The reversal of 20876938 is 83967802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19651489 + 1225449 = 4433^2 + 1107^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20876894 and 20876903.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5219233 + ... + 5219236.

Almost surely, 2^20876938 is an apocalyptic number.

20876938 is a deficient number, since it is larger than the sum of its proper divisors (10438472).

20876938 is a wasteful number, since it uses less digits than its factorization.

20876938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10438471.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 20876938 is about 4569.1288009860. The cubic root of 20876938 is about 275.3524428784.

It can be divided in two parts, 2087 and 6938, that added together give a square (9025 = 95²).

The spelling of 20876938 in words is "twenty million, eight hundred seventy-six thousand, nine hundred thirty-eight".