21145433004 has 36 divisors (see below), whose sum is σ = 53609594584. Its totient is φ = 7027558272.

The previous prime is 21145432951. The next prime is 21145433021. The reversal of 21145433004 is 40033454112.

It is a happy number.

21145433004 is a `hidden beast` number, since 2 + 114 + 543 + 3 + 0 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 859342 + ... + 883605.

Almost surely, 2^21145433004 is an apocalyptic number.

It is an amenable number.

21145433004 is an abundant number, since it is smaller than the sum of its proper divisors (32464161580).

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

21145433004 is a wasteful number, since it uses less digits than its factorization.

21145433004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743294 (or 1743289 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 21145433004 its reverse (40033454112), we get a palindrome (61178887116).

The spelling of 21145433004 in words is "twenty-one billion, one hundred forty-five million, four hundred thirty-three thousand, four".