21772462130 has 8 divisors (see below), whose sum is σ = 39190431852. Its totient is φ = 8708984848.

The previous prime is 21772462123. The next prime is 21772462133. The reversal of 21772462130 is 3126427712.

It can be written as a sum of positive squares in 2 ways, for example, as 21764805841 + 7656289 = 147529^2 + 2767^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21772462133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1088623097 + ... + 1088623116.

Almost surely, 2^21772462130 is an apocalyptic number.

21772462130 is a deficient number, since it is larger than the sum of its proper divisors (17417969722).

21772462130 is a wasteful number, since it uses less digits than its factorization.

21772462130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177246220.

The product of its (nonzero) digits is 28224, while the sum is 35.

Adding to 21772462130 its reverse (3126427712), we get a palindrome (24898889842).

The spelling of 21772462130 in words is "twenty-one billion, seven hundred seventy-two million, four hundred sixty-two thousand, one hundred thirty".