21432011734 has 16 divisors (see below), whose sum is σ = 36828288000. Its totient is φ = 9163223784.

The previous prime is 21432011729. The next prime is 21432011767. The reversal of 21432011734 is 43711023412.

It is a super-2 number, since 2×21432011734² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1820934 + ... + 1832665.

It is an arithmetic number, because the mean of its divisors is an integer number (2301768000).

Almost surely, 2^21432011734 is an apocalyptic number.

21432011734 is a deficient number, since it is larger than the sum of its proper divisors (15396276266).

21432011734 is a wasteful number, since it uses less digits than its factorization.

21432011734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3654027.

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 21432011734 in words is "twenty-one billion, four hundred thirty-two million, eleven thousand, seven hundred thirty-four".