21234153027 has 16 divisors (see below), whose sum is σ = 28660907520. Its totient is φ = 13981840992.

The previous prime is 21234153023. The next prime is 21234153043. The reversal of 21234153027 is 72035143212.

It is not a de Polignac number, because 21234153027 - 2² = 21234153023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21234152985 and 21234153003.

It is not an unprimeable number, because it can be changed into a prime (21234153023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1183558 + ... + 1201364.

It is an arithmetic number, because the mean of its divisors is an integer number (1791306720).

Almost surely, 2^21234153027 is an apocalyptic number.

21234153027 is a deficient number, since it is larger than the sum of its proper divisors (7426754493).

21234153027 is a wasteful number, since it uses less digits than its factorization.

21234153027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22682.

The product of its (nonzero) digits is 10080, while the sum is 30.

Adding to 21234153027 its reverse (72035143212), we get a palindrome (93269296239).

The spelling of 21234153027 in words is "twenty-one billion, two hundred thirty-four million, one hundred fifty-three thousand, twenty-seven".