20543946 has 16 divisors (see below), whose sum is σ = 41762208. Its totient is φ = 6735600.

The previous prime is 20543933. The next prime is 20543947. The reversal of 20543946 is 64934502.

It is not an unprimeable number, because it can be changed into a prime (20543947) 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, 27700 + ... + 28431.

It is an arithmetic number, because the mean of its divisors is an integer number (2610138).

Almost surely, 2^20543946 is an apocalyptic number.

20543946 is an abundant number, since it is smaller than the sum of its proper divisors (21218262).

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

20543946 is a wasteful number, since it uses less digits than its factorization.

20543946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56197.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 20543946 is about 4532.5429948319. The cubic root of 20543946 is about 273.8806111370.

The spelling of 20543946 in words is "twenty million, five hundred forty-three thousand, nine hundred forty-six".