21352512441 has 16 divisors (see below), whose sum is σ = 30831312960. Its totient is φ = 13066595520.

The previous prime is 21352512439. The next prime is 21352512473. The reversal of 21352512441 is 14421525312.

It is not a de Polignac number, because 21352512441 - 2¹ = 21352512439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21352512399 and 21352512408.

It is not an unprimeable number, because it can be changed into a prime (21352512481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1522350 + ... + 1536311.

It is an arithmetic number, because the mean of its divisors is an integer number (1926957060).

Almost surely, 2^21352512441 is an apocalyptic number.

It is an amenable number.

21352512441 is a deficient number, since it is larger than the sum of its proper divisors (9478800519).

21352512441 is a wasteful number, since it uses less digits than its factorization.

21352512441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3058856.

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

The spelling of 21352512441 in words is "twenty-one billion, three hundred fifty-two million, five hundred twelve thousand, four hundred forty-one".