21150152534 has 12 divisors (see below), whose sum is σ = 36904858164. Its totient is φ = 9064351044.

The previous prime is 21150152521. The next prime is 21150152579. The reversal of 21150152534 is 43525105112.

It is a super-2 number, since 2×21150152534² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21150152497 and 21150152506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107908844 + ... + 107909039.

It is an arithmetic number, because the mean of its divisors is an integer number (3075404847).

Almost surely, 2^21150152534 is an apocalyptic number.

21150152534 is a deficient number, since it is larger than the sum of its proper divisors (15754705630).

21150152534 is a wasteful number, since it uses less digits than its factorization.

21150152534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215817899 (or 215817892 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 21150152534 its reverse (43525105112), we get a palindrome (64675257646).

The spelling of 21150152534 in words is "twenty-one billion, one hundred fifty million, one hundred fifty-two thousand, five hundred thirty-four".