20403051013242 has 56 divisors (see below), whose sum is σ = 45901689872544. Its totient is φ = 6798672839304.

The previous prime is 20403051013229. The next prime is 20403051013277. The reversal of 20403051013242 is 24231015030402.

20403051013242 is a `hidden beast` number, since 2 + 0 + 403 + 0 + 5 + 1 + 0 + 13 + 242 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1822333 + ... + 6642815.

Almost surely, 2^{20403051013242} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20403051013242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22950844936272).

20403051013242 is an abundant number, since it is smaller than the sum of its proper divisors (25498638859302).

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

20403051013242 is an equidigital number, since it uses as much as digits as its factorization.

20403051013242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4823406 (or 4823391 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 20403051013242 its reverse (24231015030402), we get a palindrome (44634066043644).

The spelling of 20403051013242 in words is "twenty trillion, four hundred three billion, fifty-one million, thirteen thousand, two hundred forty-two".