20413033440 has 48 divisors (see below), whose sum is σ = 64301056848. Its totient is φ = 5443475456.

The previous prime is 20413033427. The next prime is 20413033453. The reversal of 20413033440 is 4433031402.

It is an interprime number because it is at equal distance from previous prime (20413033427) and next prime (20413033453).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20413033440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21263097 + ... + 21264056.

It is an arithmetic number, because the mean of its divisors is an integer number (1339605351).

Almost surely, 2^20413033440 is an apocalyptic number.

20413033440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20413033440 is an abundant number, since it is smaller than the sum of its proper divisors (43888023408).

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

20413033440 is a wasteful number, since it uses less digits than its factorization.

20413033440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42527171 (or 42527163 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 20413033440 its reverse (4433031402), we get a palindrome (24846064842).

The spelling of 20413033440 in words is "twenty billion, four hundred thirteen million, thirty-three thousand, four hundred forty".