20236847904 has 432 divisors, whose sum is σ = 73659051648. Its totient is φ = 5221407744.

The previous prime is 20236847903. The next prime is 20236847927. The reversal of 20236847904 is 40974863202.

It is a self number, because there is not a number n which added to its sum of digits gives 20236847904.

It is not an unprimeable number, because it can be changed into a prime (20236847903) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8621259 + ... + 8623605.

It is an arithmetic number, because the mean of its divisors is an integer number (170507064).

Almost surely, 2^20236847904 is an apocalyptic number.

20236847904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20236847904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36829525824).

20236847904 is an abundant number, since it is smaller than the sum of its proper divisors (53422203744).

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

20236847904 is a wasteful number, since it uses less digits than its factorization.

20236847904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437 (or 2419 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 20236847904 in words is "twenty billion, two hundred thirty-six million, eight hundred forty-seven thousand, nine hundred four".