21345041502 has 48 divisors (see below), whose sum is σ = 47350343040. Its totient is φ = 6945550416.

The previous prime is 21345041453. The next prime is 21345041519. The reversal of 21345041502 is 20514054312.

21345041502 is a `hidden beast` number, since 2 + 1 + 3 + 4 + 504 + 150 + 2 = 666.

It is a super-2 number, since 2×21345041502² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1530999 + ... + 1544877.

It is an arithmetic number, because the mean of its divisors is an integer number (986465480).

Almost surely, 2^21345041502 is an apocalyptic number.

21345041502 is an abundant number, since it is smaller than the sum of its proper divisors (26005301538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21345041502 is a wasteful number, since it uses less digits than its factorization.

21345041502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15917 (or 15914 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 21345041502 its reverse (20514054312), we get a palindrome (41859095814).

The spelling of 21345041502 in words is "twenty-one billion, three hundred forty-five million, forty-one thousand, five hundred two".