20432903521408 has 128 divisors (see below), whose sum is σ = 47404425744000. Its totient is φ = 8590768422912.

The previous prime is 20432903521397. The next prime is 20432903521427. The reversal of 20432903521408 is 80412530923402.

It is a tau number, because it is divible by the number of its divisors (128).

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, 559342888 + ... + 559379416.

It is an arithmetic number, because the mean of its divisors is an integer number (370347076125).

Almost surely, 2^{20432903521408} is an apocalyptic number.

20432903521408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20432903521408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23702212872000).

20432903521408 is an abundant number, since it is smaller than the sum of its proper divisors (26971522222592).

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

20432903521408 is a wasteful number, since it uses less digits than its factorization.

20432903521408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48382 (or 48370 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 20432903521408 in words is "twenty trillion, four hundred thirty-two billion, nine hundred three million, five hundred twenty-one thousand, four hundred eight".