21014350652 has 12 divisors (see below), whose sum is σ = 36779337000. Its totient is φ = 10505968656.

The previous prime is 21014350639. The next prime is 21014350657. The reversal of 21014350652 is 25605341012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014350657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261902 + ... + 332597.

It is an arithmetic number, because the mean of its divisors is an integer number (3064944750).

Almost surely, 2^21014350652 is an apocalyptic number.

It is an amenable number.

21014350652 is a deficient number, since it is larger than the sum of its proper divisors (15764986348).

21014350652 is a wasteful number, since it uses less digits than its factorization.

21014350652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603340 (or 603338 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 21014350652 its reverse (25605341012), we get a palindrome (46619691664).

The spelling of 21014350652 in words is "twenty-one billion, fourteen million, three hundred fifty thousand, six hundred fifty-two".