11403421020 has 72 divisors (see below), whose sum is σ = 35434067760. Its totient is φ = 2966741760.

The previous prime is 11403420961. The next prime is 11403421049. The reversal of 11403421020 is 2012430411.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11403420984 and 11403421002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 765210 + ... + 779969.

It is an arithmetic number, because the mean of its divisors is an integer number (492139830).

Almost surely, 2^11403421020 is an apocalyptic number.

11403421020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11403421020 is an abundant number, since it is smaller than the sum of its proper divisors (24030646740).

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

11403421020 is a wasteful number, since it uses less digits than its factorization.

11403421020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545235 (or 1545230 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 11403421020 its reverse (2012430411), we get a palindrome (13415851431).

The spelling of 11403421020 in words is "eleven billion, four hundred three million, four hundred twenty-one thousand, twenty".