21404325562 has 8 divisors (see below), whose sum is σ = 32113070100. Its totient is φ = 10699968864.

The previous prime is 21404325557. The next prime is 21404325577. The reversal of 21404325562 is 26552340412.

It can be written as a sum of positive squares in 2 ways, for example, as 20357867761 + 1046457801 = 142681^2 + 32349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1084737 + ... + 1104292.

Almost surely, 2^21404325562 is an apocalyptic number.

21404325562 is a deficient number, since it is larger than the sum of its proper divisors (10708744538).

21404325562 is a wasteful number, since it uses less digits than its factorization.

21404325562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193920.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 21404325562 its reverse (26552340412), we get a palindrome (47956665974).

The spelling of 21404325562 in words is "twenty-one billion, four hundred four million, three hundred twenty-five thousand, five hundred sixty-two".