21734055771 has 32 divisors (see below), whose sum is σ = 30324844800. Its totient is φ = 13828348800.

The previous prime is 21734055769. The next prime is 21734055803. The reversal of 21734055771 is 17755043712.

It is not a de Polignac number, because 21734055771 - 2¹ = 21734055769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21734053771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6491920 + ... + 6495266.

It is an arithmetic number, because the mean of its divisors is an integer number (947651400).

Almost surely, 2^21734055771 is an apocalyptic number.

21734055771 is a deficient number, since it is larger than the sum of its proper divisors (8590789029).

21734055771 is a wasteful number, since it uses less digits than its factorization.

21734055771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4219.

The product of its (nonzero) digits is 205800, while the sum is 42.

The spelling of 21734055771 in words is "twenty-one billion, seven hundred thirty-four million, fifty-five thousand, seven hundred seventy-one".