21043252510510 has 32 divisors (see below), whose sum is σ = 38164086590400. Its totient is φ = 8353906970112.

The previous prime is 21043252510463. The next prime is 21043252510549. The reversal of 21043252510510 is 1501525234012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12527979 + ... + 14108038.

It is an arithmetic number, because the mean of its divisors is an integer number (1192627705950).

Almost surely, 2^{21043252510510} is an apocalyptic number.

21043252510510 is a deficient number, since it is larger than the sum of its proper divisors (17120834079890).

21043252510510 is a wasteful number, since it uses less digits than its factorization.

21043252510510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26636620.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 21043252510510 its reverse (1501525234012), we get a palindrome (22544777744522).

The spelling of 21043252510510 in words is "twenty-one trillion, forty-three billion, two hundred fifty-two million, five hundred ten thousand, five hundred ten".