20051245242400 has 144 divisors (see below), whose sum is σ = 50811134129280. Its totient is φ = 7721162265600.

The previous prime is 20051245242383. The next prime is 20051245242473. The reversal of 20051245242400 is 424254215002.

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, 2077530 + ... + 6664729.

It is an arithmetic number, because the mean of its divisors is an integer number (352855098120).

Almost surely, 2^{20051245242400} is an apocalyptic number.

20051245242400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20051245242400 is an abundant number, since it is smaller than the sum of its proper divisors (30759888886880).

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

20051245242400 is a wasteful number, since it uses less digits than its factorization.

20051245242400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8742387 (or 8742374 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 31.

Adding to 20051245242400 its reverse (424254215002), we get a palindrome (20475499457402).

The spelling of 20051245242400 in words is "twenty trillion, fifty-one billion, two hundred forty-five million, two hundred forty-two thousand, four hundred".