20253215 has 8 divisors (see below), whose sum is σ = 24869328. Its totient is φ = 15825600.

The previous prime is 20253209. The next prime is 20253241. The reversal of 20253215 is 51235202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20253215 - 2⁸ = 20252959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46886 + ... + 47315.

It is an arithmetic number, because the mean of its divisors is an integer number (3108666).

Almost surely, 2^20253215 is an apocalyptic number.

20253215 is a deficient number, since it is larger than the sum of its proper divisors (4616113).

20253215 is an equidigital number, since it uses as much as digits as its factorization.

20253215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94249.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20253215 is about 4500.3572080447. The cubic root of 20253215 is about 272.5825129583.

Adding to 20253215 its reverse (51235202), we get a palindrome (71488417).

The spelling of 20253215 in words is "twenty million, two hundred fifty-three thousand, two hundred fifteen".