20979962 has 16 divisors (see below), whose sum is σ = 32442120. Its totient is φ = 10168128.

The previous prime is 20979961. The next prime is 20979983. The reversal of 20979962 is 26997902.

It can be written as a sum of positive squares in 4 ways, for example, as 19811401 + 1168561 = 4451^2 + 1081^2 .

It is a super-4 number, since 4×20979962⁴ (a number of 30 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (20979961) 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, 37388 + ... + 37944.

Almost surely, 2^20979962 is an apocalyptic number.

20979962 is a deficient number, since it is larger than the sum of its proper divisors (11462158).

20979962 is a wasteful number, since it uses less digits than its factorization.

20979962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 20979962 is about 4580.3888481220. The cubic root of 20979962 is about 275.8046384070.

The spelling of 20979962 in words is "twenty million, nine hundred seventy-nine thousand, nine hundred sixty-two".