21146542000245 has 24 divisors (see below), whose sum is σ = 36654551702496. Its totient is φ = 11277987866208.

The previous prime is 21146542000189. The next prime is 21146542000249. The reversal of 21146542000245 is 54200024564112.

21146542000245 is a `hidden beast` number, since 21 + 146 + 54 + 200 + 0 + 245 = 666.

It is not a de Polignac number, because 21146542000245 - 2³⁷ = 21009103046773 is a prime.

It is a super-3 number, since 3×21146542000245³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21146542000249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 410379 + ... + 6516248.

It is an arithmetic number, because the mean of its divisors is an integer number (1527272987604).

Almost surely, 2^{21146542000245} is an apocalyptic number.

It is an amenable number.

21146542000245 is a deficient number, since it is larger than the sum of its proper divisors (15508009702251).

21146542000245 is a wasteful number, since it uses less digits than its factorization.

21146542000245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6994481 (or 6994478 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 21146542000245 its reverse (54200024564112), we get a palindrome (75346566564357).

The spelling of 21146542000245 in words is "twenty-one trillion, one hundred forty-six billion, five hundred forty-two million, two hundred forty-five", and thus it is an aban number.