21533455196428 has 48 divisors (see below), whose sum is σ = 45669454871040. Its totient is φ = 8672583096576.

The previous prime is 21533455196369. The next prime is 21533455196437. The reversal of 21533455196428 is 82469155433512.

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, 34009800 + ... + 34637167.

It is an arithmetic number, because the mean of its divisors is an integer number (951446976480).

Almost surely, 2^{21533455196428} is an apocalyptic number.

21533455196428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21533455196428 is an abundant number, since it is smaller than the sum of its proper divisors (24135999674612).

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

21533455196428 is a wasteful number, since it uses less digits than its factorization.

21533455196428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68647654 (or 68647652 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 58.

The spelling of 21533455196428 in words is "twenty-one trillion, five hundred thirty-three billion, four hundred fifty-five million, one hundred ninety-six thousand, four hundred twenty-eight".