20464045 has 16 divisors (see below), whose sum is σ = 29543040. Its totient is φ = 13293504.

The previous prime is 20464027. The next prime is 20464057. The reversal of 20464045 is 54046402.

It is not a de Polignac number, because 20464045 - 2⁹ = 20463533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14722 + ... + 16051.

It is an arithmetic number, because the mean of its divisors is an integer number (1846440).

Almost surely, 2^20464045 is an apocalyptic number.

It is an amenable number.

20464045 is a deficient number, since it is larger than the sum of its proper divisors (9078995).

20464045 is a wasteful number, since it uses less digits than its factorization.

20464045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30804.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 20464045 is about 4523.7202610241. The cubic root of 20464045 is about 273.5250844001.

The spelling of 20464045 in words is "twenty million, four hundred sixty-four thousand, forty-five".