21160660311450 has 72 divisors (see below), whose sum is σ = 62019971690976. Its totient is φ = 5129857044000.

The previous prime is 21160660311397. The next prime is 21160660311463. The reversal of 21160660311450 is 5411306606112.

21160660311450 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 0 + 6 + 603 + 1 + 1 + 45 + 0 = 666.

It is a super-2 number, since 2×21160660311450² (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 35 ways as a sum of consecutive naturals, for example, 2137435486 + ... + 2137445385.

It is an arithmetic number, because the mean of its divisors is an integer number (861388495708).

Almost surely, 2^{21160660311450} is an apocalyptic number.

21160660311450 is an abundant number, since it is smaller than the sum of its proper divisors (40859311379526).

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

21160660311450 is a wasteful number, since it uses less digits than its factorization.

21160660311450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274880900 (or 4274880892 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

Adding to 21160660311450 its reverse (5411306606112), we get a palindrome (26571966917562).

The spelling of 21160660311450 in words is "twenty-one trillion, one hundred sixty billion, six hundred sixty million, three hundred eleven thousand, four hundred fifty".