20425132100 has 72 divisors (see below), whose sum is σ = 46089732360. Its totient is φ = 7847239680.

The previous prime is 20425132093. The next prime is 20425132111. The reversal of 20425132100 is 123152402.

It can be written as a sum of positive squares in 12 ways, for example, as 13664674816 + 6760457284 = 116896^2 + 82222^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 541454 + ... + 577946.

Almost surely, 2^20425132100 is an apocalyptic number.

20425132100 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 20425132100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23044866180).

20425132100 is an abundant number, since it is smaller than the sum of its proper divisors (25664600260).

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

20425132100 is a wasteful number, since it uses less digits than its factorization.

20425132100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36729 (or 36722 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 20425132100 its reverse (123152402), we get a palindrome (20548284502).

The spelling of 20425132100 in words is "twenty billion, four hundred twenty-five million, one hundred thirty-two thousand, one hundred".