20463918 has 16 divisors (see below), whose sum is σ = 40985040. Its totient is φ = 6811776.

The previous prime is 20463907. The next prime is 20463953. The reversal of 20463918 is 81936402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3318 + ... + 7206.

It is an arithmetic number, because the mean of its divisors is an integer number (2561565).

Almost surely, 2^20463918 is an apocalyptic number.

20463918 is an abundant number, since it is smaller than the sum of its proper divisors (20521122).

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

20463918 is a wasteful number, since it uses less digits than its factorization.

20463918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4771.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20463918 is about 4523.7062238832. The cubic root of 20463918 is about 273.5245185661.

The spelling of 20463918 in words is "twenty million, four hundred sixty-three thousand, nine hundred eighteen".