21426486879 has 8 divisors (see below), whose sum is σ = 32649884800. Its totient is φ = 12243706776.

The previous prime is 21426486869. The next prime is 21426486889. The reversal of 21426486879 is 97868462412.

It is an interprime number because it is at equal distance from previous prime (21426486869) and next prime (21426486889).

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

It is not a de Polignac number, because 21426486879 - 2¹⁵ = 21426454111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21426486859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510154429 + ... + 510154470.

It is an arithmetic number, because the mean of its divisors is an integer number (4081235600).

Almost surely, 2^21426486879 is an apocalyptic number.

21426486879 is a deficient number, since it is larger than the sum of its proper divisors (11223397921).

21426486879 is a wasteful number, since it uses less digits than its factorization.

21426486879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020308909.

The product of its digits is 9289728, while the sum is 57.

The spelling of 21426486879 in words is "twenty-one billion, four hundred twenty-six million, four hundred eighty-six thousand, eight hundred seventy-nine".