20611362100 has 72 divisors (see below), whose sum is σ = 51157003520. Its totient is φ = 7061109120.

The previous prime is 20611362097. The next prime is 20611362113. The reversal of 20611362100 is 126311602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 917806 + ... + 939994.

Almost surely, 2^20611362100 is an apocalyptic number.

20611362100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20611362100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25578501760).

20611362100 is an abundant number, since it is smaller than the sum of its proper divisors (30545641420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20611362100 is a wasteful number, since it uses less digits than its factorization.

20611362100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23537 (or 23530 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20611362100 its reverse (126311602), we get a palindrome (20737673702).

The spelling of 20611362100 in words is "twenty billion, six hundred eleven million, three hundred sixty-two thousand, one hundred".