20372662221 has 8 divisors (see below), whose sum is σ = 27191186880. Its totient is φ = 13567956192.

The previous prime is 20372662199. The next prime is 20372662259. The reversal of 20372662221 is 12226627302.

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

It is not a de Polignac number, because 20372662221 - 2⁶ = 20372662157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20372660221) 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, 3451216 + ... + 3457113.

It is an arithmetic number, because the mean of its divisors is an integer number (3398898360).

Almost surely, 2^20372662221 is an apocalyptic number.

It is an amenable number.

20372662221 is a deficient number, since it is larger than the sum of its proper divisors (6818524659).

20372662221 is an equidigital number, since it uses as much as digits as its factorization.

20372662221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6909315.

The product of its (nonzero) digits is 24192, while the sum is 33.

The spelling of 20372662221 in words is "twenty billion, three hundred seventy-two million, six hundred sixty-two thousand, two hundred twenty-one".