2420376731521 has 4 divisors (see below), whose sum is σ = 2766144836032. Its totient is φ = 2074608627012.

The previous prime is 2420376731519. The next prime is 2420376731533. The reversal of 2420376731521 is 1251376730242.

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.

It is a cyclic number.

It is not a de Polignac number, because 2420376731521 - 2¹ = 2420376731519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2420376731561) 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, 172884052245 + ... + 172884052258.

It is an arithmetic number, because the mean of its divisors is an integer number (691536209008).

Almost surely, 2^{2420376731521} is an apocalyptic number.

It is an amenable number.

2420376731521 is a deficient number, since it is larger than the sum of its proper divisors (345768104511).

2420376731521 is an equidigital number, since it uses as much as digits as its factorization.

2420376731521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345768104510.

The product of its (nonzero) digits is 423360, while the sum is 43.

The spelling of 2420376731521 in words is "two trillion, four hundred twenty billion, three hundred seventy-six million, seven hundred thirty-one thousand, five hundred twenty-one".