20620571263 has 4 divisors (see below), whose sum is σ = 20820771088. Its totient is φ = 20420371440.

The previous prime is 20620571221. The next prime is 20620571287. The reversal of 20620571263 is 36217502602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20620571263 - 2²¹ = 20618474111 is a prime.

It is a super-2 number, since 2×20620571263² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620571063) 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, 100099758 + ... + 100099963.

It is an arithmetic number, because the mean of its divisors is an integer number (5205192772).

Almost surely, 2^20620571263 is an apocalyptic number.

20620571263 is a deficient number, since it is larger than the sum of its proper divisors (200199825).

20620571263 is a wasteful number, since it uses less digits than its factorization.

20620571263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200199824.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 20620571263 in words is "twenty billion, six hundred twenty million, five hundred seventy-one thousand, two hundred sixty-three".