20620929045 has 16 divisors (see below), whose sum is σ = 34729986240. Its totient is φ = 10418995584.

The previous prime is 20620928987. The next prime is 20620929103. The reversal of 20620929045 is 54092902602.

It is an interprime number because it is at equal distance from previous prime (20620928987) and next prime (20620929103).

It is not a de Polignac number, because 20620929045 - 2⁷ = 20620928917 is a prime.

It is a super-2 number, since 2×20620929045² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20620928994 and 20620929012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36176784 + ... + 36177353.

It is an arithmetic number, because the mean of its divisors is an integer number (2170624140).

Almost surely, 2^20620929045 is an apocalyptic number.

It is an amenable number.

20620929045 is a deficient number, since it is larger than the sum of its proper divisors (14109057195).

20620929045 is a wasteful number, since it uses less digits than its factorization.

20620929045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72354164.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 20620929045 in words is "twenty billion, six hundred twenty million, nine hundred twenty-nine thousand, forty-five".