20636214261 has 64 divisors (see below), whose sum is σ = 32032702464. Its totient is φ = 11712729600.

The previous prime is 20636214257. The next prime is 20636214271. The reversal of 20636214261 is 16241263602.

It is not a de Polignac number, because 20636214261 - 2² = 20636214257 is a prime.

It is a super-2 number, since 2×20636214261² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20636214251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8702406 + ... + 8704776.

It is an arithmetic number, because the mean of its divisors is an integer number (500510976).

Almost surely, 2^20636214261 is an apocalyptic number.

It is an amenable number.

20636214261 is a deficient number, since it is larger than the sum of its proper divisors (11396488203).

20636214261 is a wasteful number, since it uses less digits than its factorization.

20636214261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754.

The product of its (nonzero) digits is 20736, while the sum is 33.

Adding to 20636214261 its reverse (16241263602), we get a palindrome (36877477863).

The spelling of 20636214261 in words is "twenty billion, six hundred thirty-six million, two hundred fourteen thousand, two hundred sixty-one".