21064206000 has 80 divisors (see below), whose sum is σ = 67911019488. Its totient is φ = 5617120000.

The previous prime is 21064205983. The next prime is 21064206061. The reversal of 21064206000 is 60246012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1749351 + ... + 1761350.

Almost surely, 2^21064206000 is an apocalyptic number.

21064206000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21064206000 is an abundant number, since it is smaller than the sum of its proper divisors (46846813488).

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

21064206000 is a wasteful number, since it uses less digits than its factorization.

21064206000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510727 (or 3510711 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The spelling of 21064206000 in words is "twenty-one billion, sixty-four million, two hundred six thousand".