20456148587 has 4 divisors (see below), whose sum is σ = 23378455536. Its totient is φ = 17533841640.

The previous prime is 20456148571. The next prime is 20456148593. The reversal of 20456148587 is 78584165402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20456148587 - 2⁴ = 20456148571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20456148527) 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, 1461153464 + ... + 1461153477.

It is an arithmetic number, because the mean of its divisors is an integer number (5844613884).

Almost surely, 2^20456148587 is an apocalyptic number.

20456148587 is a deficient number, since it is larger than the sum of its proper divisors (2922306949).

20456148587 is an equidigital number, since it uses as much as digits as its factorization.

20456148587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2922306948.

The product of its (nonzero) digits is 2150400, while the sum is 50.

The spelling of 20456148587 in words is "twenty billion, four hundred fifty-six million, one hundred forty-eight thousand, five hundred eighty-seven".