21034342406998 has 4 divisors (see below), whose sum is σ = 31551513610500. Its totient is φ = 10517171203498.

The previous prime is 21034342406983. The next prime is 21034342406999. The reversal of 21034342406998 is 89960424343012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034342406999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5258585601748 + ... + 5258585601751.

It is an arithmetic number, because the mean of its divisors is an integer number (7887878402625).

Almost surely, 2^{21034342406998} is an apocalyptic number.

21034342406998 is a deficient number, since it is larger than the sum of its proper divisors (10517171203502).

21034342406998 is a wasteful number, since it uses less digits than its factorization.

21034342406998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10517171203501.

The product of its (nonzero) digits is 8957952, while the sum is 55.

The spelling of 21034342406998 in words is "twenty-one trillion, thirty-four billion, three hundred forty-two million, four hundred six thousand, nine hundred ninety-eight".