20404233510 has 64 divisors (see below), whose sum is σ = 52007837184. Its totient is φ = 5105548800.

The previous prime is 20404233503. The next prime is 20404233557. The reversal of 20404233510 is 1533240402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108375 + ... + 229245.

It is an arithmetic number, because the mean of its divisors is an integer number (812622456).

Almost surely, 2^20404233510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20404233510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26003918592).

20404233510 is an abundant number, since it is smaller than the sum of its proper divisors (31603603674).

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

20404233510 is a wasteful number, since it uses less digits than its factorization.

20404233510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121229.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 20404233510 its reverse (1533240402), we get a palindrome (21937473912).

The spelling of 20404233510 in words is "twenty billion, four hundred four million, two hundred thirty-three thousand, five hundred ten".