21254143548 has 48 divisors (see below), whose sum is σ = 54112101120. Its totient is φ = 6439382400.

The previous prime is 21254143517. The next prime is 21254143553. The reversal of 21254143548 is 84534145212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 826728 + ... + 852048.

It is an arithmetic number, because the mean of its divisors is an integer number (1127335440).

Almost surely, 2^21254143548 is an apocalyptic number.

It is an amenable number.

21254143548 is an abundant number, since it is smaller than the sum of its proper divisors (32857957572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21254143548 is a wasteful number, since it uses less digits than its factorization.

21254143548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31698 (or 31696 counting only the distinct ones).

The product of its digits is 153600, while the sum is 39.

The spelling of 21254143548 in words is "twenty-one billion, two hundred fifty-four million, one hundred forty-three thousand, five hundred forty-eight".