421803021532 has 48 divisors (see below), whose sum is σ = 784179002880. Its totient is φ = 197964561600.

The previous prime is 421803021481. The next prime is 421803021547. The reversal of 421803021532 is 235120308124.

It is a junction number, because it is equal to n+sod(n) for n = 421803021494 and 421803021503.

It is a congruent 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, 3893782 + ... + 4000642.

It is an arithmetic number, because the mean of its divisors is an integer number (16337062560).

Almost surely, 2^421803021532 is an apocalyptic number.

It is an amenable number.

421803021532 is a deficient number, since it is larger than the sum of its proper divisors (362375981348).

421803021532 is a wasteful number, since it uses less digits than its factorization.

421803021532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107362 (or 107360 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 421803021532 its reverse (235120308124), we get a palindrome (656923329656).

The spelling of 421803021532 in words is "four hundred twenty-one billion, eight hundred three million, twenty-one thousand, five hundred thirty-two".