21151352013 has 16 divisors (see below), whose sum is σ = 30796695552. Its totient is φ = 12806046000.

The previous prime is 21151352003. The next prime is 21151352039. The reversal of 21151352013 is 31025315112.

It is not a de Polignac number, because 21151352013 - 2⁵ = 21151351981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21151352003) 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, 290683 + ... + 356088.

It is an arithmetic number, because the mean of its divisors is an integer number (1924793472).

Almost surely, 2^21151352013 is an apocalyptic number.

It is an amenable number.

21151352013 is a deficient number, since it is larger than the sum of its proper divisors (9645343539).

21151352013 is a wasteful number, since it uses less digits than its factorization.

21151352013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647776.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 21151352013 its reverse (31025315112), we get a palindrome (52176667125).

The spelling of 21151352013 in words is "twenty-one billion, one hundred fifty-one million, three hundred fifty-two thousand, thirteen".