21152430213 has 16 divisors (see below), whose sum is σ = 28356518400. Its totient is φ = 14025187440.

The previous prime is 21152430203. The next prime is 21152430283. The reversal of 21152430213 is 31203425112.

It is not a de Polignac number, because 21152430213 - 2¹⁶ = 21152364677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152430203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390648 + ... + 441486.

It is an arithmetic number, because the mean of its divisors is an integer number (1772282400).

Almost surely, 2^21152430213 is an apocalyptic number.

It is an amenable number.

21152430213 is a deficient number, since it is larger than the sum of its proper divisors (7204088187).

21152430213 is a wasteful number, since it uses less digits than its factorization.

21152430213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51592.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21152430213 its reverse (31203425112), we get a palindrome (52355855325).

The spelling of 21152430213 in words is "twenty-one billion, one hundred fifty-two million, four hundred thirty thousand, two hundred thirteen".