21014040030 has 64 divisors (see below), whose sum is σ = 53057203200. Its totient is φ = 5318794880.

The previous prime is 21014039941. The next prime is 21014040031. The reversal of 21014040030 is 3004041012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 21014039991 and 21014040009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014040031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153366 + ... + 256025.

It is an arithmetic number, because the mean of its divisors is an integer number (829018800).

Almost surely, 2^21014040030 is an apocalyptic number.

21014040030 is an abundant number, since it is smaller than the sum of its proper divisors (32043163170).

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

21014040030 is a wasteful number, since it uses less digits than its factorization.

21014040030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409489.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21014040030 its reverse (3004041012), we get a palindrome (24018081042).

The spelling of 21014040030 in words is "twenty-one billion, fourteen million, forty thousand, thirty".