21000152235 has 32 divisors (see below), whose sum is σ = 34741550592. Its totient is φ = 10824753920.

The previous prime is 21000152233. The next prime is 21000152237. The reversal of 21000152235 is 53225100012.

It is an interprime number because it is at equal distance from previous prime (21000152233) and next prime (21000152237).

It is not a de Polignac number, because 21000152235 - 2¹ = 21000152233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000152233) 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 31 ways as a sum of consecutive naturals, for example, 93759 + ... + 225368.

It is an arithmetic number, because the mean of its divisors is an integer number (1085673456).

Almost surely, 2^21000152235 is an apocalyptic number.

21000152235 is a deficient number, since it is larger than the sum of its proper divisors (13741398357).

21000152235 is a wasteful number, since it uses less digits than its factorization.

21000152235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319283.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 21000152235 its reverse (53225100012), we get a palindrome (74225252247).

The spelling of 21000152235 in words is "twenty-one billion, one hundred fifty-two thousand, two hundred thirty-five".