20019546 has 12 divisors (see below), whose sum is σ = 43375722. Its totient is φ = 6673176.

The previous prime is 20019511. The next prime is 20019547. The reversal of 20019546 is 64591002.

It can be written as a sum of positive squares in only one way, i.e., 19900521 + 119025 = 4461^2 + 345^2 .

It is a super-2 number, since 2×20019546² = 801564444092232, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20019547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556081 + ... + 556116.

Almost surely, 2^20019546 is an apocalyptic number.

20019546 is an abundant number, since it is smaller than the sum of its proper divisors (23356176).

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

20019546 is a wasteful number, since it uses less digits than its factorization.

20019546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112205 (or 1112202 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20019546 is about 4474.3207305691. The cubic root of 20019546 is about 271.5301595465.

The spelling of 20019546 in words is "twenty million, nineteen thousand, five hundred forty-six".