21151326006 has 12 divisors (see below), whose sum is σ = 45827873052. Its totient is φ = 7050441996.

The previous prime is 21151325963. The next prime is 21151326023. The reversal of 21151326006 is 60062315112.

21151326006 is a `hidden beast` number, since 2 + 1 + 1 + 51 + 3 + 2 + 600 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 587536816 + ... + 587536851.

It is an arithmetic number, because the mean of its divisors is an integer number (3818989421).

Almost surely, 2^21151326006 is an apocalyptic number.

21151326006 is an abundant number, since it is smaller than the sum of its proper divisors (24676547046).

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

21151326006 is a wasteful number, since it uses less digits than its factorization.

21151326006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175073675 (or 1175073672 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The spelling of 21151326006 in words is "twenty-one billion, one hundred fifty-one million, three hundred twenty-six thousand, six".