21216030532526 has 32 divisors (see below), whose sum is σ = 32430555843840. Its totient is φ = 10407705422400.

The previous prime is 21216030532471. The next prime is 21216030532573. The reversal of 21216030532526 is 62523503061212.

It is a self number, because there is not a number n which added to its sum of digits gives 21216030532526.

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, 263149961 + ... + 263230571.

It is an arithmetic number, because the mean of its divisors is an integer number (1013454870120).

Almost surely, 2^{21216030532526} is an apocalyptic number.

21216030532526 is a deficient number, since it is larger than the sum of its proper divisors (11214525311314).

21216030532526 is a wasteful number, since it uses less digits than its factorization.

21216030532526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92120.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 21216030532526 its reverse (62523503061212), we get a palindrome (83739533593738).

The spelling of 21216030532526 in words is "twenty-one trillion, two hundred sixteen billion, thirty million, five hundred thirty-two thousand, five hundred twenty-six".