20136454 has 32 divisors (see below), whose sum is σ = 34320384. Its totient is φ = 8791200.

The previous prime is 20136443. The next prime is 20136463. The reversal of 20136454 is 45463102.

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 90187 + ... + 90409.

It is an arithmetic number, because the mean of its divisors is an integer number (1072512).

Almost surely, 2^20136454 is an apocalyptic number.

20136454 is a deficient number, since it is larger than the sum of its proper divisors (14183930).

20136454 is a wasteful number, since it uses less digits than its factorization.

20136454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20136454 is about 4487.3660425688. The cubic root of 20136454 is about 272.0576849252.

Adding to 20136454 its reverse (45463102), we get a palindrome (65599556).

The spelling of 20136454 in words is "twenty million, one hundred thirty-six thousand, four hundred fifty-four".