21340661052150 has 72 divisors (see below), whose sum is σ = 62547537498264. Its totient is φ = 5173493587200.

The previous prime is 21340661052089. The next prime is 21340661052169. The reversal of 21340661052150 is 5125016604312.

21340661052150 is a `hidden beast` number, since 2 + 1 + 34 + 0 + 6 + 610 + 5 + 2 + 1 + 5 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2155617379 + ... + 2155627278.

It is an arithmetic number, because the mean of its divisors is an integer number (868715798587).

Almost surely, 2^{21340661052150} is an apocalyptic number.

21340661052150 is an abundant number, since it is smaller than the sum of its proper divisors (41206876446114).

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

21340661052150 is a wasteful number, since it uses less digits than its factorization.

21340661052150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4311244686 (or 4311244678 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 21340661052150 its reverse (5125016604312), we get a palindrome (26465677656462).

The spelling of 21340661052150 in words is "twenty-one trillion, three hundred forty billion, six hundred sixty-one million, fifty-two thousand, one hundred fifty".