20250515 has 16 divisors (see below), whose sum is σ = 25081056. Its totient is φ = 15686400.

The previous prime is 20250509. The next prime is 20250539. The reversal of 20250515 is 51505202.

It is a de Polignac number, because none of the positive numbers 2^k-20250515 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35180 + ... + 35750.

It is an arithmetic number, because the mean of its divisors is an integer number (1567566).

Almost surely, 2^20250515 is an apocalyptic number.

20250515 is a deficient number, since it is larger than the sum of its proper divisors (4830541).

20250515 is a wasteful number, since it uses less digits than its factorization.

20250515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 20250515 is about 4500.0572218584. The cubic root of 20250515 is about 272.5703995648.

Adding to 20250515 its reverse (51505202), we get a palindrome (71755717).

The spelling of 20250515 in words is "twenty million, two hundred fifty thousand, five hundred fifteen".