21801419284 has 6 divisors (see below), whose sum is σ = 38152483754. Its totient is φ = 10900709640.

The previous prime is 21801419243. The next prime is 21801419303. The reversal of 21801419284 is 48291410812.

It can be written as a sum of positive squares in only one way, i.e., 15620000400 + 6181418884 = 124980^2 + 78622^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2725177407 + ... + 2725177414.

Almost surely, 2^21801419284 is an apocalyptic number.

It is an amenable number.

21801419284 is a deficient number, since it is larger than the sum of its proper divisors (16351064470).

21801419284 is a wasteful number, since it uses less digits than its factorization.

21801419284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5450354825 (or 5450354823 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The spelling of 21801419284 in words is "twenty-one billion, eight hundred one million, four hundred nineteen thousand, two hundred eighty-four".