20421101432 has 16 divisors (see below), whose sum is σ = 38293468200. Its totient is φ = 10209509920.

The previous prime is 20421101431. The next prime is 20421101507. The reversal of 20421101432 is 23410112402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20421101431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43307 + ... + 206682.

Almost surely, 2^20421101432 is an apocalyptic number.

It is an amenable number.

20421101432 is a deficient number, since it is larger than the sum of its proper divisors (17872366768).

20421101432 is a wasteful number, since it uses less digits than its factorization.

20421101432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260206 (or 260202 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20421101432 its reverse (23410112402), we get a palindrome (43831213834).

The spelling of 20421101432 in words is "twenty billion, four hundred twenty-one million, one hundred one thousand, four hundred thirty-two".