21533014254 has 16 divisors (see below), whose sum is σ = 43655974992. Its totient is φ = 7079347008.

The previous prime is 21533014247. The next prime is 21533014267. The reversal of 21533014254 is 45241033512.

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, 24580629 + ... + 24581504.

It is an arithmetic number, because the mean of its divisors is an integer number (2728498437).

Almost surely, 2^21533014254 is an apocalyptic number.

21533014254 is an abundant number, since it is smaller than the sum of its proper divisors (22122960738).

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

21533014254 is a wasteful number, since it uses less digits than its factorization.

21533014254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49162211.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21533014254 its reverse (45241033512), we get a palindrome (66774047766).

The spelling of 21533014254 in words is "twenty-one billion, five hundred thirty-three million, fourteen thousand, two hundred fifty-four".