21035400528 has 40 divisors (see below), whose sum is σ = 54438042528. Its totient is φ = 6999336832.

The previous prime is 21035400527. The next prime is 21035400539. The reversal of 21035400528 is 82500453012.

It is a junction number, because it is equal to n+sod(n) for n = 21035400495 and 21035400504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035400521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362175 + ... + 416222.

Almost surely, 2^21035400528 is an apocalyptic number.

It is an amenable number.

21035400528 is an abundant number, since it is smaller than the sum of its proper divisors (33402642000).

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

21035400528 is a wasteful number, since it uses less digits than its factorization.

21035400528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778971 (or 778965 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 21035400528 in words is "twenty-one billion, thirty-five million, four hundred thousand, five hundred twenty-eight".