20245407 has 16 divisors (see below), whose sum is σ = 33223680. Its totient is φ = 10678752.

The previous prime is 20245399. The next prime is 20245411. The reversal of 20245407 is 70454202.

It is not a de Polignac number, because 20245407 - 2³ = 20245399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20245447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36807 + ... + 37352.

It is an arithmetic number, because the mean of its divisors is an integer number (2076480).

Almost surely, 2^20245407 is an apocalyptic number.

20245407 is a deficient number, since it is larger than the sum of its proper divisors (12978273).

20245407 is a wasteful number, since it uses less digits than its factorization.

20245407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74182.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 20245407 is about 4499.4896377256. The cubic root of 20245407 is about 272.5474798731.

Adding to 20245407 its reverse (70454202), we get a palindrome (90699609).

The spelling of 20245407 in words is "twenty million, two hundred forty-five thousand, four hundred seven".