21160653223464 has 24 divisors (see below), whose sum is σ = 57310102480410. Its totient is φ = 7053551074464.

The previous prime is 21160653223453. The next prime is 21160653223513. The reversal of 21160653223464 is 46432235606112.

21160653223464 is a `hidden beast` number, since 2 + 1 + 1 + 606 + 5 + 3 + 2 + 2 + 34 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15343343375364 + 5817309848100 = 3917058^2 + 2411910^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 146948980647 + ... + 146948980790.

Almost surely, 2^{21160653223464} is an apocalyptic number.

21160653223464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21160653223464 is an abundant number, since it is smaller than the sum of its proper divisors (36149449256946).

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

21160653223464 is a wasteful number, since it uses less digits than its factorization.

21160653223464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293897961449 (or 293897961442 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

Adding to 21160653223464 its reverse (46432235606112), we get a palindrome (67592888829576).

The spelling of 21160653223464 in words is "twenty-one trillion, one hundred sixty billion, six hundred fifty-three million, two hundred twenty-three thousand, four hundred sixty-four".