20022012100 has 18 divisors (see below), whose sum is σ = 43447766474. Its totient is φ = 8008804800.

The previous prime is 20022012047. The next prime is 20022012137. The reversal of 20022012100 is 121022002.

It can be written as a sum of positive squares in 3 ways, for example, as 397364356 + 19624647744 = 19934^2 + 140088^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100109961 + ... + 100110160.

Almost surely, 2^20022012100 is an apocalyptic number.

20022012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022012100 is an abundant number, since it is smaller than the sum of its proper divisors (23425754374).

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

20022012100 is a wasteful number, since it uses less digits than its factorization.

20022012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200220135 (or 200220128 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20022012100 its reverse (121022002), we get a palindrome (20143034102).

It can be divided in two parts, 2002 and 2012100, that added together give a palindrome (2014102).

The spelling of 20022012100 in words is "twenty billion, twenty-two million, twelve thousand, one hundred".