20262979 has 16 divisors (see below), whose sum is σ = 22861440. Its totient is φ = 17800000.

The previous prime is 20262973. The next prime is 20262989. The reversal of 20262979 is 97926202.

It is a cyclic number.

It is not a de Polignac number, because 20262979 - 2¹⁷ = 20131907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20262973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80604 + ... + 80854.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^20262979 is an apocalyptic number.

20262979 is a deficient number, since it is larger than the sum of its proper divisors (2598461).

20262979 is a wasteful number, since it uses less digits than its factorization.

20262979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 20262979 is about 4501.4418801091. The cubic root of 20262979 is about 272.6263095946.

It can be divided in two parts, 2026 and 2979, that added together give a palindrome (5005).

The spelling of 20262979 in words is "twenty million, two hundred sixty-two thousand, nine hundred seventy-nine".