21649433234 has 32 divisors (see below), whose sum is σ = 39382156800. Its totient is φ = 8790652800.

The previous prime is 21649433227. The next prime is 21649433263. The reversal of 21649433234 is 43233494612.

It is a junction number, because it is equal to n+sod(n) for n = 21649433191 and 21649433200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1212059 + ... + 1229790.

It is an arithmetic number, because the mean of its divisors is an integer number (1230692400).

Almost surely, 2^21649433234 is an apocalyptic number.

21649433234 is a deficient number, since it is larger than the sum of its proper divisors (17732723566).

21649433234 is a wasteful number, since it uses less digits than its factorization.

21649433234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441906.

The product of its digits is 373248, while the sum is 41.

The spelling of 21649433234 in words is "twenty-one billion, six hundred forty-nine million, four hundred thirty-three thousand, two hundred thirty-four".