21242762563146 has 16 divisors (see below), whose sum is σ = 42572053696608. Its totient is φ = 7066499426000.

The previous prime is 21242762563051. The next prime is 21242762563163. The reversal of 21242762563146 is 64136526724212.

It is a super-2 number, since 2×21242762563146² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3605353905 + ... + 3605359796.

It is an arithmetic number, because the mean of its divisors is an integer number (2660753356038).

Almost surely, 2^{21242762563146} is an apocalyptic number.

21242762563146 is an abundant number, since it is smaller than the sum of its proper divisors (21329291133462).

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

21242762563146 is a wasteful number, since it uses less digits than its factorization.

21242762563146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7210714197.

The product of its digits is 5806080, while the sum is 51.

The spelling of 21242762563146 in words is "twenty-one trillion, two hundred forty-two billion, seven hundred sixty-two million, five hundred sixty-three thousand, one hundred forty-six".