21941285354 has 4 divisors (see below), whose sum is σ = 32911928034. Its totient is φ = 10970642676.

The previous prime is 21941285323. The next prime is 21941285389. The reversal of 21941285354 is 45358214912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16199434729 + 5741850625 = 127277^2 + 75775^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5485321337 + ... + 5485321340.

Almost surely, 2^21941285354 is an apocalyptic number.

21941285354 is a deficient number, since it is larger than the sum of its proper divisors (10970642680).

21941285354 is a wasteful number, since it uses less digits than its factorization.

21941285354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10970642679.

The product of its digits is 345600, while the sum is 44.

The spelling of 21941285354 in words is "twenty-one billion, nine hundred forty-one million, two hundred eighty-five thousand, three hundred fifty-four".