21777153130 has 16 divisors (see below), whose sum is σ = 39297620520. Its totient is φ = 8688917952.

The previous prime is 21777153121. The next prime is 21777153131. The reversal of 21777153130 is 3135177712.

It can be written as a sum of positive squares in 4 ways, for example, as 17341992721 + 4435160409 = 131689^2 + 66597^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21777153130.

It is not an unprimeable number, because it can be changed into a prime (21777153131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2738745 + ... + 2746684.

Almost surely, 2^21777153130 is an apocalyptic number.

21777153130 is a deficient number, since it is larger than the sum of its proper divisors (17520467390).

21777153130 is a wasteful number, since it uses less digits than its factorization.

21777153130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5485833.

The product of its (nonzero) digits is 30870, while the sum is 37.

The spelling of 21777153130 in words is "twenty-one billion, seven hundred seventy-seven million, one hundred fifty-three thousand, one hundred thirty".