20502624545 has 12 divisors (see below), whose sum is σ = 26641281276. Its totient is φ = 15140399040.

The previous prime is 20502624509. The next prime is 20502624551. The reversal of 20502624545 is 54542620502.

It can be written as a sum of positive squares in 6 ways, for example, as 2663282449 + 17839342096 = 51607^2 + 133564^2 .

It is not a de Polignac number, because 20502624545 - 2²² = 20498430241 is a prime.

It is a super-2 number, since 2×20502624545² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12130886 + ... + 12132575.

It is an arithmetic number, because the mean of its divisors is an integer number (2220106773).

Almost surely, 2^20502624545 is an apocalyptic number.

It is an amenable number.

20502624545 is a deficient number, since it is larger than the sum of its proper divisors (6138656731).

20502624545 is a wasteful number, since it uses less digits than its factorization.

20502624545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24263492 (or 24263479 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 20502624545 in words is "twenty billion, five hundred two million, six hundred twenty-four thousand, five hundred forty-five".