21325415354 has 4 divisors (see below), whose sum is σ = 31988123034. Its totient is φ = 10662707676.

The previous prime is 21325415351. The next prime is 21325415369. The reversal of 21325415354 is 45351452312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15576288025 + 5749127329 = 124805^2 + 75823^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21325415351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5331353837 + ... + 5331353840.

Almost surely, 2^21325415354 is an apocalyptic number.

21325415354 is a deficient number, since it is larger than the sum of its proper divisors (10662707680).

21325415354 is a wasteful number, since it uses less digits than its factorization.

21325415354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10662707679.

The product of its digits is 72000, while the sum is 35.

Adding to 21325415354 its reverse (45351452312), we get a palindrome (66676867666).

The spelling of 21325415354 in words is "twenty-one billion, three hundred twenty-five million, four hundred fifteen thousand, three hundred fifty-four".