20372201475721 has 8 divisors (see below), whose sum is σ = 20659254458688. Its totient is φ = 20085151842000.

The previous prime is 20372201475673. The next prime is 20372201475751. The reversal of 20372201475721 is 12757410227302.

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 20372201475721 - 2¹³ = 20372201467529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20372201475751) 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, 13017351 + ... + 14498131.

It is an arithmetic number, because the mean of its divisors is an integer number (2582406807336).

Almost surely, 2^{20372201475721} is an apocalyptic number.

It is an amenable number.

20372201475721 is a deficient number, since it is larger than the sum of its proper divisors (287052982967).

20372201475721 is a wasteful number, since it uses less digits than its factorization.

20372201475721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674623.

The product of its (nonzero) digits is 329280, while the sum is 43.

The spelling of 20372201475721 in words is "twenty trillion, three hundred seventy-two billion, two hundred one million, four hundred seventy-five thousand, seven hundred twenty-one".