20372046281 has 4 divisors (see below), whose sum is σ = 20453210064. Its totient is φ = 20290882500.

The previous prime is 20372046241. The next prime is 20372046283. The reversal of 20372046281 is 18264027302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18264027302 = 2 ⋅9132013651.

It is a cyclic number.

It is not a de Polignac number, because 20372046281 - 2⁶ = 20372046217 is a prime.

It is a super-2 number, since 2×20372046281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20372046283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40581515 + ... + 40582016.

It is an arithmetic number, because the mean of its divisors is an integer number (5113302516).

Almost surely, 2^20372046281 is an apocalyptic number.

It is an amenable number.

20372046281 is a deficient number, since it is larger than the sum of its proper divisors (81163783).

20372046281 is an equidigital number, since it uses as much as digits as its factorization.

20372046281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81163782.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 20372046281 in words is "twenty billion, three hundred seventy-two million, forty-six thousand, two hundred eighty-one".