20949059753 has 4 divisors (see below), whose sum is σ = 20950583040. Its totient is φ = 20947536468.

The previous prime is 20949059741. The next prime is 20949059773. The reversal of 20949059753 is 35795094902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20949059753 - 2⁴ = 20949059737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20949059695 and 20949059704.

It is not an unprimeable number, because it can be changed into a prime (20949059773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740825 + ... + 768582.

It is an arithmetic number, because the mean of its divisors is an integer number (5237645760).

Almost surely, 2^20949059753 is an apocalyptic number.

It is an amenable number.

20949059753 is a deficient number, since it is larger than the sum of its proper divisors (1523287).

20949059753 is a wasteful number, since it uses less digits than its factorization.

20949059753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523286.

The product of its (nonzero) digits is 3061800, while the sum is 53.

The spelling of 20949059753 in words is "twenty billion, nine hundred forty-nine million, fifty-nine thousand, seven hundred fifty-three".