20161546 has 8 divisors (see below), whose sum is σ = 31834080. Its totient is φ = 9550188.

The previous prime is 20161523. The next prime is 20161549. The reversal of 20161546 is 64516102.

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

It is a super-2 number, since 2×20161546² = 812975874220232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20161546.

It is not an unprimeable number, because it can be changed into a prime (20161549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265246 + ... + 265321.

It is an arithmetic number, because the mean of its divisors is an integer number (3979260).

Almost surely, 2^20161546 is an apocalyptic number.

20161546 is a deficient number, since it is larger than the sum of its proper divisors (11672534).

20161546 is a wasteful number, since it uses less digits than its factorization.

20161546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530588.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20161546 is about 4490.1610216116. The cubic root of 20161546 is about 272.1706415545.

Adding to 20161546 its reverse (64516102), we get a palindrome (84677648).

The spelling of 20161546 in words is "twenty million, one hundred sixty-one thousand, five hundred forty-six".