20242551313 has 4 divisors (see below), whose sum is σ = 20390307300. Its totient is φ = 20094795328.

The previous prime is 20242551289. The next prime is 20242551317. The reversal of 20242551313 is 31315524202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31315524202 = 2 ⋅15657762101.

It can be written as a sum of positive squares in 2 ways, for example, as 11754245889 + 8488305424 = 108417^2 + 92132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20242551313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20242551317) 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, 73877788 + ... + 73878061.

It is an arithmetic number, because the mean of its divisors is an integer number (5097576825).

Almost surely, 2^20242551313 is an apocalyptic number.

It is an amenable number.

20242551313 is a deficient number, since it is larger than the sum of its proper divisors (147755987).

20242551313 is a wasteful number, since it uses less digits than its factorization.

20242551313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147755986.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 20242551313 in words is "twenty billion, two hundred forty-two million, five hundred fifty-one thousand, three hundred thirteen".