21361464520146 has 32 divisors (see below), whose sum is σ = 47475976161600. Its totient is φ = 7119579922560.

The previous prime is 21361464520049. The next prime is 21361464520219. The reversal of 21361464520146 is 64102546416312.

21361464520146 is a `hidden beast` number, since 2 + 1 + 3 + 61 + 4 + 64 + 520 + 1 + 4 + 6 = 666.

It is a super-2 number, since 2×21361464520146² (a number of 27 digits) contains 22 as substring.

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, 24801856 + ... + 25648683.

It is an arithmetic number, because the mean of its divisors is an integer number (1483624255050).

Almost surely, 2^{21361464520146} is an apocalyptic number.

21361464520146 is an abundant number, since it is smaller than the sum of its proper divisors (26114511641454).

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

21361464520146 is a wasteful number, since it uses less digits than its factorization.

21361464520146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50458391 (or 50458385 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 21361464520146 in words is "twenty-one trillion, three hundred sixty-one billion, four hundred sixty-four million, five hundred twenty thousand, one hundred forty-six".