21055233105530 has 32 divisors (see below), whose sum is σ = 40817694950928. Its totient is φ = 7773680793600.

The previous prime is 21055233105527. The next prime is 21055233105583. The reversal of 21055233105530 is 3550133255012.

It can be written as a sum of positive squares in 8 ways, for example, as 1249680287881 + 19805552817649 = 1117891^2 + 4450343^2 .

It is a super-2 number, since 2×21055233105530² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4007501 + ... + 7626960.

Almost surely, 2^{21055233105530} is an apocalyptic number.

21055233105530 is a deficient number, since it is larger than the sum of its proper divisors (19762461845398).

21055233105530 is a wasteful number, since it uses less digits than its factorization.

21055233105530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11648402.

The product of its (nonzero) digits is 67500, while the sum is 35.

The spelling of 21055233105530 in words is "twenty-one trillion, fifty-five billion, two hundred thirty-three million, one hundred five thousand, five hundred thirty".