20245415 has 8 divisors (see below), whose sum is σ = 24444528. Its totient is φ = 16096320.

The previous prime is 20245411. The next prime is 20245439. The reversal of 20245415 is 51454202.

It is a happy number.

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

It is not a de Polignac number, because 20245415 - 2² = 20245411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20245411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11606 + ... + 13235.

It is an arithmetic number, because the mean of its divisors is an integer number (3055566).

Almost surely, 2^20245415 is an apocalyptic number.

20245415 is a deficient number, since it is larger than the sum of its proper divisors (4199113).

20245415 is a wasteful number, since it uses less digits than its factorization.

20245415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25009.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 20245415 is about 4499.4905267152. The cubic root of 20245415 is about 272.5475157722.

Adding to 20245415 its reverse (51454202), we get a palindrome (71699617).

The spelling of 20245415 in words is "twenty million, two hundred forty-five thousand, four hundred fifteen".