21333046546 has 16 divisors (see below), whose sum is σ = 36744264000. Its totient is φ = 9099402480.

The previous prime is 21333046543. The next prime is 21333046577. The reversal of 21333046546 is 64564033312.

It is not an unprimeable number, because it can be changed into a prime (21333046543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3607921 + ... + 3613828.

It is an arithmetic number, because the mean of its divisors is an integer number (2296516500).

Almost surely, 2^21333046546 is an apocalyptic number.

21333046546 is a deficient number, since it is larger than the sum of its proper divisors (15411217454).

21333046546 is a wasteful number, since it uses less digits than its factorization.

21333046546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7221969.

The product of its (nonzero) digits is 155520, while the sum is 37.

Adding to 21333046546 its reverse (64564033312), we get a palindrome (85897079858).

The spelling of 21333046546 in words is "twenty-one billion, three hundred thirty-three million, forty-six thousand, five hundred forty-six".