20102514775 has 12 divisors (see below), whose sum is σ = 28488135472. Its totient is φ = 13784581440.

The previous prime is 20102514737. The next prime is 20102514779. The reversal of 20102514775 is 57741520102.

It is a de Polignac number, because none of the positive numbers 2^k-20102514775 is a prime.

It is a super-2 number, since 2×20102514775² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20102514775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102514779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57435582 + ... + 57435931.

Almost surely, 2^20102514775 is an apocalyptic number.

20102514775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20102514775 is a deficient number, since it is larger than the sum of its proper divisors (8385620697).

20102514775 is a wasteful number, since it uses less digits than its factorization.

20102514775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114871530 (or 114871525 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 34.

The spelling of 20102514775 in words is "twenty billion, one hundred two million, five hundred fourteen thousand, seven hundred seventy-five".