20154313513 has 4 divisors (see below), whose sum is σ = 20156675728. Its totient is φ = 20151951300.

The previous prime is 20154313511. The next prime is 20154313561. The reversal of 20154313513 is 31531345102.

It is a happy number.

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 20154313513 - 2¹ = 20154313511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20154313511) 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, 1168263 + ... + 1185388.

It is an arithmetic number, because the mean of its divisors is an integer number (5039168932).

Almost surely, 2^20154313513 is an apocalyptic number.

It is an amenable number.

20154313513 is a deficient number, since it is larger than the sum of its proper divisors (2362215).

20154313513 is an equidigital number, since it uses as much as digits as its factorization.

20154313513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362214.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 20154313513 its reverse (31531345102), we get a palindrome (51685658615).

The spelling of 20154313513 in words is "twenty billion, one hundred fifty-four million, three hundred thirteen thousand, five hundred thirteen".