20102211400 has 24 divisors (see below), whose sum is σ = 46737641970. Its totient is φ = 8040884480.

The previous prime is 20102211359. The next prime is 20102211401. The reversal of 20102211400 is 411220102.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 13000104324 + 7102107076 = 114018^2 + 84274^2 .

It is not an unprimeable number, because it can be changed into a prime (20102211401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50255329 + ... + 50255728.

Almost surely, 2^20102211400 is an apocalyptic number.

20102211400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102211400 is an abundant number, since it is smaller than the sum of its proper divisors (26635430570).

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

20102211400 is a wasteful number, since it uses less digits than its factorization.

20102211400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100511073 (or 100511064 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20102211400 its reverse (411220102), we get a palindrome (20513431502).

The spelling of 20102211400 in words is "twenty billion, one hundred two million, two hundred eleven thousand, four hundred".