20662243955 has 8 divisors (see below), whose sum is σ = 26253204192. Its totient is φ = 15557454208.

The previous prime is 20662243951. The next prime is 20662243981. The reversal of 20662243955 is 55934226602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20662243955 - 2² = 20662243951 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20662243951) 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, 121542527 + ... + 121542696.

It is an arithmetic number, because the mean of its divisors is an integer number (3281650524).

Almost surely, 2^20662243955 is an apocalyptic number.

20662243955 is a deficient number, since it is larger than the sum of its proper divisors (5590960237).

20662243955 is a wasteful number, since it uses less digits than its factorization.

20662243955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243085245.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 20662243955 in words is "twenty billion, six hundred sixty-two million, two hundred forty-three thousand, nine hundred fifty-five".