20182640562 has 112 divisors (see below), whose sum is σ = 53082025920. Its totient is φ = 5632242336.

The previous prime is 20182640561. The next prime is 20182640573. The reversal of 20182640562 is 26504628102.

It is a happy number.

20182640562 is a `hidden beast` number, since 2 + 0 + 1 + 8 + 2 + 640 + 5 + 6 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (20182640561) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 415864 + ... + 461852.

It is an arithmetic number, because the mean of its divisors is an integer number (473946660).

Almost surely, 2^20182640562 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20182640562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26541012960).

20182640562 is an abundant number, since it is smaller than the sum of its proper divisors (32899385358).

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

20182640562 is an equidigital number, since it uses as much as digits as its factorization.

20182640562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46059 (or 46044 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 20182640562 in words is "twenty billion, one hundred eighty-two million, six hundred forty thousand, five hundred sixty-two".