20402443213344 has 144 divisors (see below), whose sum is σ = 61563910288608. Its totient is φ = 6387059644416.

The previous prime is 20402443213283. The next prime is 20402443213393. The reversal of 20402443213344 is 44331234420402.

20402443213344 is a `hidden beast` number, since 2 + 0 + 40 + 2 + 443 + 2 + 133 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20402443213299 and 20402443213308.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2175202 + ... + 6748065.

It is an arithmetic number, because the mean of its divisors is an integer number (427527154782).

Almost surely, 2^{20402443213344} is an apocalyptic number.

20402443213344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20402443213344 is an abundant number, since it is smaller than the sum of its proper divisors (41161467075264).

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

20402443213344 is a wasteful number, since it uses less digits than its factorization.

20402443213344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8923767 (or 8923756 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 36.

Adding to 20402443213344 its reverse (44331234420402), we get a palindrome (64733677633746).

The spelling of 20402443213344 in words is "twenty trillion, four hundred two billion, four hundred forty-three million, two hundred thirteen thousand, three hundred forty-four".