20454546 has 16 divisors (see below), whose sum is σ = 46753344. Its totient is φ = 5844144.

The previous prime is 20454529. The next prime is 20454547. The reversal of 20454546 is 64545402.

It is a super-2 number, since 2×20454546² = 836776904132232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20454547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243465 + ... + 243548.

It is an arithmetic number, because the mean of its divisors is an integer number (2922084).

Almost surely, 2^20454546 is an apocalyptic number.

20454546 is an abundant number, since it is smaller than the sum of its proper divisors (26298798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20454546 is a wasteful number, since it uses less digits than its factorization.

20454546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487025.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 20454546 is about 4522.6702289687. The cubic root of 20454546 is about 273.4827562274.

Adding to 20454546 its reverse (64545402), we get a palindrome (84999948).

The spelling of 20454546 in words is "twenty million, four hundred fifty-four thousand, five hundred forty-six".