21772205302 has 16 divisors (see below), whose sum is σ = 32982573312. Its totient is φ = 10778060520.

The previous prime is 21772205291. The next prime is 21772205347. The reversal of 21772205302 is 20350227712.

It is a super-2 number, since 2×21772205302² (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, 1291693 + ... + 1308439.

It is an arithmetic number, because the mean of its divisors is an integer number (2061410832).

Almost surely, 2^21772205302 is an apocalyptic number.

21772205302 is a deficient number, since it is larger than the sum of its proper divisors (11210368010).

21772205302 is a wasteful number, since it uses less digits than its factorization.

21772205302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23163.

The product of its (nonzero) digits is 11760, while the sum is 31.

The spelling of 21772205302 in words is "twenty-one billion, seven hundred seventy-two million, two hundred five thousand, three hundred two".