20549001 has 32 divisors (see below), whose sum is σ = 31518720. Its totient is φ = 11793600.

The previous prime is 20548999. The next prime is 20549003. The reversal of 20549001 is 10094502.

It is an interprime number because it is at equal distance from previous prime (20548999) and next prime (20549003).

It is not a de Polignac number, because 20549001 - 2¹ = 20548999 is a prime.

It is a super-2 number, since 2×20549001² = 844522884196002, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20549003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54030 + ... + 54408.

It is an arithmetic number, because the mean of its divisors is an integer number (984960).

Almost surely, 2^20549001 is an apocalyptic number.

It is an amenable number.

20549001 is a deficient number, since it is larger than the sum of its proper divisors (10969719).

20549001 is a wasteful number, since it uses less digits than its factorization.

20549001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 20549001 is about 4533.1005945159. The cubic root of 20549001 is about 273.9030727899.

The spelling of 20549001 in words is "twenty million, five hundred forty-nine thousand, one".