21203152510 has 64 divisors (see below), whose sum is σ = 40493882880. Its totient is φ = 7979771520.

The previous prime is 21203152507. The next prime is 21203152517. The reversal of 21203152510 is 1525130212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203152517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6121039 + ... + 6124501.

It is an arithmetic number, because the mean of its divisors is an integer number (632716920).

Almost surely, 2^21203152510 is an apocalyptic number.

21203152510 is a deficient number, since it is larger than the sum of its proper divisors (19290730370).

21203152510 is a wasteful number, since it uses less digits than its factorization.

21203152510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 21203152510 its reverse (1525130212), we get a palindrome (22728282722).

The spelling of 21203152510 in words is "twenty-one billion, two hundred three million, one hundred fifty-two thousand, five hundred ten".