20545959 has 32 divisors (see below), whose sum is σ = 32648704. Its totient is φ = 11249280.

The previous prime is 20545957. The next prime is 20546023. The reversal of 20545959 is 95954502.

It is not a de Polignac number, because 20545959 - 2¹ = 20545957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545957) 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, 54897 + ... + 55269.

It is an arithmetic number, because the mean of its divisors is an integer number (1020272).

Almost surely, 2^20545959 is an apocalyptic number.

20545959 is a deficient number, since it is larger than the sum of its proper divisors (12102745).

20545959 is a wasteful number, since it uses less digits than its factorization.

20545959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487.

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 20545959 is about 4532.7650501653. The cubic root of 20545959 is about 273.8895562485.

It can be divided in two parts, 205 and 45959, that added together give a palindrome (46164).

The spelling of 20545959 in words is "twenty million, five hundred forty-five thousand, nine hundred fifty-nine".