20001243432 has 64 divisors (see below), whose sum is σ = 50313461760. Its totient is φ = 6625771200.

The previous prime is 20001243391. The next prime is 20001243473. The reversal of 20001243432 is 23434210002.

It is an interprime number because it is at equal distance from previous prime (20001243391) and next prime (20001243473).

It is a super-2 number, since 2×20001243432² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20001243399 and 20001243408.

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, 8392113 + ... + 8394495.

It is an arithmetic number, because the mean of its divisors is an integer number (786147840).

Almost surely, 2^20001243432 is an apocalyptic number.

It is an amenable number.

20001243432 is an abundant number, since it is smaller than the sum of its proper divisors (30312218328).

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

20001243432 is a wasteful number, since it uses less digits than its factorization.

20001243432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414 (or 4410 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20001243432 its reverse (23434210002), we get a palindrome (43435453434).

The spelling of 20001243432 in words is "twenty billion, one million, two hundred forty-three thousand, four hundred thirty-two".