20321401232 has 160 divisors (see below), whose sum is σ = 46975279104. Its totient is φ = 8419276800.

The previous prime is 20321401229. The next prime is 20321401259. The reversal of 20321401232 is 23210412302.

It is a super-2 number, since 2×20321401232² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8406488 + ... + 8408904.

Almost surely, 2^20321401232 is an apocalyptic number.

20321401232 is a gapful number since it is divisible by the number (22) 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 20321401232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23487639552).

20321401232 is an abundant number, since it is smaller than the sum of its proper divisors (26653877872).

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

20321401232 is a wasteful number, since it uses less digits than its factorization.

20321401232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557 (or 2551 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20321401232 its reverse (23210412302), we get a palindrome (43531813534).

The spelling of 20321401232 in words is "twenty billion, three hundred twenty-one million, four hundred one thousand, two hundred thirty-two".