21450000332 has 6 divisors (see below), whose sum is σ = 37537500588. Its totient is φ = 10725000164.

The previous prime is 21450000323. The next prime is 21450000347. The reversal of 21450000332 is 23300005412.

It is a happy number.

It is a super-2 number, since 2×21450000332² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2681250038 + ... + 2681250045.

It is an arithmetic number, because the mean of its divisors is an integer number (6256250098).

Almost surely, 2^21450000332 is an apocalyptic number.

It is an amenable number.

21450000332 is a deficient number, since it is larger than the sum of its proper divisors (16087500256).

21450000332 is a wasteful number, since it uses less digits than its factorization.

21450000332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362500087 (or 5362500085 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 21450000332 its reverse (23300005412), we get a palindrome (44750005744).

The spelling of 21450000332 in words is "twenty-one billion, four hundred fifty million, three hundred thirty-two", and thus it is an aban number.