20154513 has 4 divisors (see below), whose sum is σ = 26872688. Its totient is φ = 13436340.

The previous prime is 20154473. The next prime is 20154523. The reversal of 20154513 is 31545102.

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 not a de Polignac number, because 20154513 - 2¹⁰ = 20153489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20154513.

It is not an unprimeable number, because it can be changed into a prime (20154523) 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, 3359083 + ... + 3359088.

It is an arithmetic number, because the mean of its divisors is an integer number (6718172).

Almost surely, 2^20154513 is an apocalyptic number.

It is an amenable number.

20154513 is a deficient number, since it is larger than the sum of its proper divisors (6718175).

20154513 is an equidigital number, since it uses as much as digits as its factorization.

20154513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718174.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 20154513 is about 4489.3777965326. The cubic root of 20154513 is about 272.1389905634.

Adding to 20154513 its reverse (31545102), we get a palindrome (51699615).

The spelling of 20154513 in words is "twenty million, one hundred fifty-four thousand, five hundred thirteen".