20408126712460 has 24 divisors (see below), whose sum is σ = 42858945349920. Its totient is φ = 8162892731904.

The previous prime is 20408126712451. The next prime is 20408126712499. The reversal of 20408126712460 is 6421762180402.

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, 21904320 + ... + 22816999.

It is an arithmetic number, because the mean of its divisors is an integer number (1785789389580).

Almost surely, 2^{20408126712460} is an apocalyptic number.

20408126712460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20408126712460 is an abundant number, since it is smaller than the sum of its proper divisors (22450818637460).

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

20408126712460 is a wasteful number, since it uses less digits than its factorization.

20408126712460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44744145 (or 44744143 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

Adding to 20408126712460 its reverse (6421762180402), we get a palindrome (26829888892862).

The spelling of 20408126712460 in words is "twenty trillion, four hundred eight billion, one hundred twenty-six million, seven hundred twelve thousand, four hundred sixty".