21233646354 has 32 divisors (see below), whose sum is σ = 43845474816. Its totient is φ = 6848271360.

The previous prime is 21233646353. The next prime is 21233646377. The reversal of 21233646354 is 45364633212.

It is not an unprimeable number, because it can be changed into a prime (21233646353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1749234 + ... + 1761330.

It is an arithmetic number, because the mean of its divisors is an integer number (1370171088).

Almost surely, 2^21233646354 is an apocalyptic number.

21233646354 is an abundant number, since it is smaller than the sum of its proper divisors (22611828462).

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

21233646354 is a wasteful number, since it uses less digits than its factorization.

21233646354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21570.

The product of its digits is 311040, while the sum is 39.

The spelling of 21233646354 in words is "twenty-one billion, two hundred thirty-three million, six hundred forty-six thousand, three hundred fifty-four".