21746029534 has 4 divisors (see below), whose sum is σ = 32619044304. Its totient is φ = 10873014766.

The previous prime is 21746029517. The next prime is 21746029537. The reversal of 21746029534 is 43592064712.

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 (21746029537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5436507382 + ... + 5436507385.

It is an arithmetic number, because the mean of its divisors is an integer number (8154761076).

Almost surely, 2^21746029534 is an apocalyptic number.

21746029534 is a deficient number, since it is larger than the sum of its proper divisors (10873014770).

21746029534 is a wasteful number, since it uses less digits than its factorization.

21746029534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10873014769.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 21746029534 in words is "twenty-one billion, seven hundred forty-six million, twenty-nine thousand, five hundred thirty-four".