21283857054 has 48 divisors (see below), whose sum is σ = 48872520720. Its totient is φ = 6865743600.

The previous prime is 21283857043. The next prime is 21283857071. The reversal of 21283857054 is 45075838212.

21283857054 is a `hidden beast` number, since 2 + 1 + 28 + 3 + 8 + 570 + 54 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153177 + ... + 256964.

It is an arithmetic number, because the mean of its divisors is an integer number (1018177515).

Almost surely, 2^21283857054 is an apocalyptic number.

21283857054 is an abundant number, since it is smaller than the sum of its proper divisors (27588663666).

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

21283857054 is a wasteful number, since it uses less digits than its factorization.

21283857054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410214 (or 410177 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 21283857054 in words is "twenty-one billion, two hundred eighty-three million, eight hundred fifty-seven thousand, fifty-four".