21435151044 has 24 divisors (see below), whose sum is σ = 50056619200. Its totient is φ = 7139155104.

The previous prime is 21435151037. The next prime is 21435151051. The reversal of 21435151044 is 44015153412.

It is an interprime number because it is at equal distance from previous prime (21435151037) and next prime (21435151051).

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, 721744 + ... + 750855.

Almost surely, 2^21435151044 is an apocalyptic number.

It is an amenable number.

21435151044 is an abundant number, since it is smaller than the sum of its proper divisors (28621468156).

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

21435151044 is a wasteful number, since it uses less digits than its factorization.

21435151044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473819 (or 1473817 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 21435151044 in words is "twenty-one billion, four hundred thirty-five million, one hundred fifty-one thousand, forty-four".