21425335413 has 8 divisors (see below), whose sum is σ = 28569554400. Its totient is φ = 14282336688.

The previous prime is 21425335361. The next prime is 21425335457. The reversal of 21425335413 is 31453352412.

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

It is not a de Polignac number, because 21425335413 - 2⁸ = 21425335157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21425335013) 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, 263278 + ... + 334911.

It is an arithmetic number, because the mean of its divisors is an integer number (3571194300).

Almost surely, 2^21425335413 is an apocalyptic number.

It is an amenable number.

21425335413 is a deficient number, since it is larger than the sum of its proper divisors (7144218987).

21425335413 is a wasteful number, since it uses less digits than its factorization.

21425335413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610131.

The product of its digits is 43200, while the sum is 33.

Adding to 21425335413 its reverse (31453352412), we get a palindrome (52878687825).

The spelling of 21425335413 in words is "twenty-one billion, four hundred twenty-five million, three hundred thirty-five thousand, four hundred thirteen".