21433554534 has 16 divisors (see below), whose sum is σ = 48990981888. Its totient is φ = 6123872712.

The previous prime is 21433554521. The next prime is 21433554547. The reversal of 21433554534 is 43545533412.

It is an interprime number because it is at equal distance from previous prime (21433554521) and next prime (21433554547).

It is a junction number, because it is equal to n+sod(n) for n = 21433554492 and 21433554501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255161322 + ... + 255161405.

It is an arithmetic number, because the mean of its divisors is an integer number (3061936368).

Almost surely, 2^21433554534 is an apocalyptic number.

21433554534 is an abundant number, since it is smaller than the sum of its proper divisors (27557427354).

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

21433554534 is a wasteful number, since it uses less digits than its factorization.

21433554534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510322739.

The product of its digits is 432000, while the sum is 39.

The spelling of 21433554534 in words is "twenty-one billion, four hundred thirty-three million, five hundred fifty-four thousand, five hundred thirty-four".