20386432 has 32 divisors (see below), whose sum is σ = 44308800. Its totient is φ = 9265920.

The previous prime is 20386423. The next prime is 20386433. The reversal of 20386432 is 23468302.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 20386432.

It is not an unprimeable number, because it can be changed into a prime (20386433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5832 + ... + 8647.

It is an arithmetic number, because the mean of its divisors is an integer number (1384650).

Almost surely, 2^20386432 is an apocalyptic number.

20386432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20386432 is an abundant number, since it is smaller than the sum of its proper divisors (23922368).

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

20386432 is a wasteful number, since it uses less digits than its factorization.

20386432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14504 (or 14492 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20386432 is about 4515.1336635807. The cubic root of 20386432 is about 273.1788511690.

The spelling of 20386432 in words is "twenty million, three hundred eighty-six thousand, four hundred thirty-two".