20404452450 has 192 divisors, whose sum is σ = 54886487040. Its totient is φ = 4999760640.

The previous prime is 20404452437. The next prime is 20404452451. The reversal of 20404452450 is 5425440402.

It is a super-2 number, since 2×20404452450² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (20404452451) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20465352 + ... + 20466348.

It is an arithmetic number, because the mean of its divisors is an integer number (285867120).

Almost surely, 2^20404452450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20404452450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27443243520).

20404452450 is an abundant number, since it is smaller than the sum of its proper divisors (34482034590).

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

20404452450 is a wasteful number, since it uses less digits than its factorization.

20404452450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 30.

Adding to 20404452450 its reverse (5425440402), we get a palindrome (25829892852).

The spelling of 20404452450 in words is "twenty billion, four hundred four million, four hundred fifty-two thousand, four hundred fifty".