20620746 has 24 divisors (see below), whose sum is σ = 44761860. Its totient is φ = 6860736.

The previous prime is 20620709. The next prime is 20620751. The reversal of 20620746 is 64702602.

It can be written as a sum of positive squares in 2 ways, for example, as 20602521 + 18225 = 4539^2 + 135^2 .

It is a super-4 number, since 4×20620746⁴ (a number of 30 digits) contains 4444 as substring.

It is a Curzon number.

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 in 11 ways as a sum of consecutive naturals, for example, 18040 + ... + 19148.

Almost surely, 2^20620746 is an apocalyptic number.

20620746 is an abundant number, since it is smaller than the sum of its proper divisors (24141114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20620746 is a wasteful number, since it uses less digits than its factorization.

20620746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150 (or 2147 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20620746 is about 4541.0071570082. The cubic root of 20620746 is about 274.2214718872.

The spelling of 20620746 in words is "twenty million, six hundred twenty thousand, seven hundred forty-six".