21152206364562 has 192 divisors, whose sum is σ = 57098253977856. Its totient is φ = 5510157857280.

The previous prime is 21152206364533. The next prime is 21152206364599. The reversal of 21152206364562 is 26546360225112.

21152206364562 is a `hidden beast` number, since 2 + 1 + 1 + 5 + 2 + 2 + 0 + 636 + 4 + 5 + 6 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 715239208 + ... + 715268780.

It is an arithmetic number, because the mean of its divisors is an integer number (297386739468).

Almost surely, 2^{21152206364562} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21152206364562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28549126988928).

21152206364562 is an abundant number, since it is smaller than the sum of its proper divisors (35946047613294).

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

21152206364562 is a wasteful number, since it uses less digits than its factorization.

21152206364562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34945 (or 34942 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

Adding to 21152206364562 its reverse (26546360225112), we get a palindrome (47698566589674).

The spelling of 21152206364562 in words is "twenty-one trillion, one hundred fifty-two billion, two hundred six million, three hundred sixty-four thousand, five hundred sixty-two".