20401325452520 has 64 divisors (see below), whose sum is σ = 47023808610240. Its totient is φ = 7961282675200.

The previous prime is 20401325452517. The next prime is 20401325452531. The reversal of 20401325452520 is 2525452310402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71510879 + ... + 71795601.

It is an arithmetic number, because the mean of its divisors is an integer number (734747009535).

Almost surely, 2^{20401325452520} is an apocalyptic number.

20401325452520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20401325452520 is an abundant number, since it is smaller than the sum of its proper divisors (26622483157720).

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

20401325452520 is a wasteful number, since it uses less digits than its factorization.

20401325452520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328466 (or 328462 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 20401325452520 its reverse (2525452310402), we get a palindrome (22926777762922).

The spelling of 20401325452520 in words is "twenty trillion, four hundred one billion, three hundred twenty-five million, four hundred fifty-two thousand, five hundred twenty".