20510423315 has 4 divisors (see below), whose sum is σ = 24612507984. Its totient is φ = 16408338648.

The previous prime is 20510423309. The next prime is 20510423341. The reversal of 20510423315 is 51332401502.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20510423315 - 2⁴ = 20510423299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2051042327 + ... + 2051042336.

It is an arithmetic number, because the mean of its divisors is an integer number (6153126996).

Almost surely, 2^20510423315 is an apocalyptic number.

20510423315 is a deficient number, since it is larger than the sum of its proper divisors (4102084669).

20510423315 is an equidigital number, since it uses as much as digits as its factorization.

20510423315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4102084668.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20510423315 its reverse (51332401502), we get a palindrome (71842824817).

The spelling of 20510423315 in words is "twenty billion, five hundred ten million, four hundred twenty-three thousand, three hundred fifteen".