20449185744 has 80 divisors (see below), whose sum is σ = 58852483200. Its totient is φ = 6075084288.

The previous prime is 20449185739. The next prime is 20449185761. The reversal of 20449185744 is 44758194402.

It is a super-2 number, since 2×20449185744² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 20449185693 and 20449185702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546924 + ... + 583115.

It is an arithmetic number, because the mean of its divisors is an integer number (735656040).

Almost surely, 2^20449185744 is an apocalyptic number.

20449185744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20449185744 is an abundant number, since it is smaller than the sum of its proper divisors (38403297456).

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

20449185744 is a wasteful number, since it uses less digits than its factorization.

20449185744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130092 (or 1130086 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 20449185744 in words is "twenty billion, four hundred forty-nine million, one hundred eighty-five thousand, seven hundred forty-four".