21874280518 has 16 divisors (see below), whose sum is σ = 35024797440. Its totient is φ = 10215563400.

The previous prime is 21874280501. The next prime is 21874280551. The reversal of 21874280518 is 81508247812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4051098 + ... + 4056493.

It is an arithmetic number, because the mean of its divisors is an integer number (2189049840).

Almost surely, 2^21874280518 is an apocalyptic number.

21874280518 is a deficient number, since it is larger than the sum of its proper divisors (13150516922).

21874280518 is a wasteful number, since it uses less digits than its factorization.

21874280518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8107683.

The product of its (nonzero) digits is 286720, while the sum is 46.

The spelling of 21874280518 in words is "twenty-one billion, eight hundred seventy-four million, two hundred eighty thousand, five hundred eighteen".