20936770245 has 40 divisors (see below), whose sum is σ = 37546524576. Its totient is φ = 11161688544.

The previous prime is 20936770241. The next prime is 20936770271. The reversal of 20936770245 is 54207763902.

It is not a de Polignac number, because 20936770245 - 2² = 20936770241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20936770245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20936770241) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1125994 + ... + 1144436.

Almost surely, 2^20936770245 is an apocalyptic number.

It is an amenable number.

20936770245 is a deficient number, since it is larger than the sum of its proper divisors (16609754331).

20936770245 is a wasteful number, since it uses less digits than its factorization.

20936770245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21263 (or 21254 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 20936770245 in words is "twenty billion, nine hundred thirty-six million, seven hundred seventy thousand, two hundred forty-five".