21533407414 has 4 divisors (see below), whose sum is σ = 32300111124. Its totient is φ = 10766703706.

The previous prime is 21533407411. The next prime is 21533407417. The reversal of 21533407414 is 41470433512.

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

It is an interprime number because it is at equal distance from previous prime (21533407411) and next prime (21533407417).

It is a self number, because there is not a number n which added to its sum of digits gives 21533407414.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21533407411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5383351852 + ... + 5383351855.

It is an arithmetic number, because the mean of its divisors is an integer number (8075027781).

Almost surely, 2^21533407414 is an apocalyptic number.

21533407414 is a deficient number, since it is larger than the sum of its proper divisors (10766703710).

21533407414 is a wasteful number, since it uses less digits than its factorization.

21533407414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10766703709.

The product of its (nonzero) digits is 40320, while the sum is 34.

The spelling of 21533407414 in words is "twenty-one billion, five hundred thirty-three million, four hundred seven thousand, four hundred fourteen".