21200220118 has 16 divisors (see below), whose sum is σ = 39647165184. Its totient is φ = 8259825960.

The previous prime is 21200220113. The next prime is 21200220131. The reversal of 21200220118 is 81102200212.

It is a junction number, because it is equal to n+sod(n) for n = 21200220095 and 21200220104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200220113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68831730 + ... + 68832037.

It is an arithmetic number, because the mean of its divisors is an integer number (2477947824).

Almost surely, 2^21200220118 is an apocalyptic number.

21200220118 is a deficient number, since it is larger than the sum of its proper divisors (18446945066).

21200220118 is a wasteful number, since it uses less digits than its factorization.

21200220118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137663787.

The product of its (nonzero) digits is 128, while the sum is 19.

The spelling of 21200220118 in words is "twenty-one billion, two hundred million, two hundred twenty thousand, one hundred eighteen".