21505467000 has 64 divisors (see below), whose sum is σ = 67097066400. Its totient is φ = 5734790400.

The previous prime is 21505466959. The next prime is 21505467013. The reversal of 21505467000 is 76450512.

It is a super-2 number, since 2×21505467000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 3581245 + ... + 3587244.

Almost surely, 2^21505467000 is an apocalyptic number.

21505467000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21505467000 is an abundant number, since it is smaller than the sum of its proper divisors (45591599400).

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

21505467000 is a wasteful number, since it uses less digits than its factorization.

21505467000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7168513 (or 7168499 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The spelling of 21505467000 in words is "twenty-one billion, five hundred five million, four hundred sixty-seven thousand".