21223545354 has 96 divisors (see below), whose sum is σ = 51570649728. Its totient is φ = 6253632000.

The previous prime is 21223545349. The next prime is 21223545379. The reversal of 21223545354 is 45354532212.

21223545354 is a `hidden beast` number, since 2 + 122 + 35 + 453 + 54 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1015894 + ... + 1036574.

It is an arithmetic number, because the mean of its divisors is an integer number (537194268).

Almost surely, 2^21223545354 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21223545354, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25785324864).

21223545354 is an abundant number, since it is smaller than the sum of its proper divisors (30347104374).

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

21223545354 is a wasteful number, since it uses less digits than its factorization.

21223545354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20844 (or 20841 counting only the distinct ones).

The product of its digits is 144000, while the sum is 36.

The spelling of 21223545354 in words is "twenty-one billion, two hundred twenty-three million, five hundred forty-five thousand, three hundred fifty-four".