21811024342 has 8 divisors (see below), whose sum is σ = 32899311000. Its totient is φ = 10844587344.

The previous prime is 21811024297. The next prime is 21811024349. The reversal of 21811024342 is 24342011812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21811024342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21811024349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30461967 + ... + 30462682.

It is an arithmetic number, because the mean of its divisors is an integer number (4112413875).

Almost surely, 2^21811024342 is an apocalyptic number.

21811024342 is a deficient number, since it is larger than the sum of its proper divisors (11088286658).

21811024342 is a wasteful number, since it uses less digits than its factorization.

21811024342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60924830.

The product of its (nonzero) digits is 3072, while the sum is 28.

The spelling of 21811024342 in words is "twenty-one billion, eight hundred eleven million, twenty-four thousand, three hundred forty-two".