20454518 has 16 divisors (see below), whose sum is σ = 35142144. Its totient is φ = 8746920.

The previous prime is 20454481. The next prime is 20454523. The reversal of 20454518 is 81545402.

It is a super-2 number, since 2×20454518² = 836774613224648, 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 7 ways as a sum of consecutive naturals, for example, 6323 + ... + 8993.

It is an arithmetic number, because the mean of its divisors is an integer number (2196384).

Almost surely, 2^20454518 is an apocalyptic number.

20454518 is a deficient number, since it is larger than the sum of its proper divisors (14687626).

20454518 is a wasteful number, since it uses less digits than its factorization.

20454518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3227.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 20454518 is about 4522.6671334512. The cubic root of 20454518 is about 273.4826314382.

The spelling of 20454518 in words is "twenty million, four hundred fifty-four thousand, five hundred eighteen".