20628139773 has 16 divisors (see below), whose sum is σ = 28972177920. Its totient is φ = 13019117616.

The previous prime is 20628139769. The next prime is 20628139799. The reversal of 20628139773 is 37793182602.

It is not a de Polignac number, because 20628139773 - 2² = 20628139769 is a prime.

It is a super-3 number, since 3×20628139773³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20628139723) 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, 45465 + ... + 208142.

It is an arithmetic number, because the mean of its divisors is an integer number (1810761120).

Almost surely, 2^20628139773 is an apocalyptic number.

It is an amenable number.

20628139773 is a deficient number, since it is larger than the sum of its proper divisors (8344038147).

20628139773 is a wasteful number, since it uses less digits than its factorization.

20628139773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255056.

The product of its (nonzero) digits is 762048, while the sum is 48.

The spelling of 20628139773 in words is "twenty billion, six hundred twenty-eight million, one hundred thirty-nine thousand, seven hundred seventy-three".