20498455 has 8 divisors (see below), whose sum is σ = 24842304. Its totient is φ = 16236000.

The previous prime is 20498453. The next prime is 20498459. The reversal of 20498455 is 55489402.

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

It is not a de Polignac number, because 20498455 - 2¹ = 20498453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20498453) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 19791 + ... + 20800.

It is an arithmetic number, because the mean of its divisors is an integer number (3105288).

Almost surely, 2^20498455 is an apocalyptic number.

20498455 is a deficient number, since it is larger than the sum of its proper divisors (4343849).

20498455 is a wasteful number, since it uses less digits than its factorization.

20498455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40697.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 20498455 is about 4527.5219491461. The cubic root of 20498455 is about 273.6783080614.

The spelling of 20498455 in words is "twenty million, four hundred ninety-eight thousand, four hundred fifty-five".