20445454 has 8 divisors (see below), whose sum is σ = 30721680. Its totient is φ = 10204896.

The previous prime is 20445443. The next prime is 20445487. The reversal of 20445454 is 45454402.

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

It is a super-2 number, since 2×20445454² = 836033178532232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7434 + ... + 9805.

It is an arithmetic number, because the mean of its divisors is an integer number (3840210).

Almost surely, 2^20445454 is an apocalyptic number.

20445454 is a deficient number, since it is larger than the sum of its proper divisors (10276226).

20445454 is a wasteful number, since it uses less digits than its factorization.

20445454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17834.

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 20445454 is about 4521.6649588398. The cubic root of 20445454 is about 273.4422293974.

Adding to 20445454 its reverse (45454402), we get a palindrome (65899856).

The spelling of 20445454 in words is "twenty million, four hundred forty-five thousand, four hundred fifty-four".