20042495 has 16 divisors (see below), whose sum is σ = 26345088. Its totient is φ = 14516640.

The previous prime is 20042489. The next prime is 20042513. The reversal of 20042495 is 59424002.

It is not a de Polignac number, because 20042495 - 2⁴ = 20042479 is a prime.

It is a congruent 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, 16292 + ... + 17478.

It is an arithmetic number, because the mean of its divisors is an integer number (1646568).

Almost surely, 2^20042495 is an apocalyptic number.

20042495 is a deficient number, since it is larger than the sum of its proper divisors (6302593).

20042495 is a wasteful number, since it uses less digits than its factorization.

20042495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20042495 is about 4476.8845193952. The cubic root of 20042495 is about 271.6338742876.

Adding to 20042495 its reverse (59424002), we get a palindrome (79466497).

The spelling of 20042495 in words is "twenty million, forty-two thousand, four hundred ninety-five".