21148898253 has 8 divisors (see below), whose sum is σ = 32226892608. Its totient is φ = 12085084704.

The previous prime is 21148898231. The next prime is 21148898257. The reversal of 21148898253 is 35289884112.

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

It is not a de Polignac number, because 21148898253 - 2⁸ = 21148897997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21148898196 and 21148898205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21148898257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503545176 + ... + 503545217.

It is an arithmetic number, because the mean of its divisors is an integer number (4028361576).

Almost surely, 2^21148898253 is an apocalyptic number.

It is an amenable number.

21148898253 is a deficient number, since it is larger than the sum of its proper divisors (11077994355).

21148898253 is a wasteful number, since it uses less digits than its factorization.

21148898253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007090403.

The product of its digits is 1105920, while the sum is 51.

The spelling of 21148898253 in words is "twenty-one billion, one hundred forty-eight million, eight hundred ninety-eight thousand, two hundred fifty-three".