21148898263 has 8 divisors (see below), whose sum is σ = 22623808032. Its totient is φ = 19699639296.

The previous prime is 21148898257. The next prime is 21148898269. The reversal of 21148898263 is 36289884112.

It is an interprime number because it is at equal distance from previous prime (21148898257) and next prime (21148898269).

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

It is a cyclic number.

It is not a de Polignac number, because 21148898263 - 2⁵ = 21148898231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21148898263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21148898269) 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, 6410995 + ... + 6414292.

It is an arithmetic number, because the mean of its divisors is an integer number (2827976004).

Almost surely, 2^21148898263 is an apocalyptic number.

21148898263 is a deficient number, since it is larger than the sum of its proper divisors (1474909769).

21148898263 is a wasteful number, since it uses less digits than its factorization.

21148898263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12825401.

The product of its digits is 1327104, while the sum is 52.

The spelling of 21148898263 in words is "twenty-one billion, one hundred forty-eight million, eight hundred ninety-eight thousand, two hundred sixty-three".