21076466775 has 384 divisors, whose sum is σ = 47996928000. Its totient is φ = 8077708800.

The previous prime is 21076466711. The next prime is 21076466797. The reversal of 21076466775 is 57766467012.

It is a happy number.

It is not a de Polignac number, because 21076466775 - 2⁶ = 21076466711 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 196976272 + ... + 196976378.

It is an arithmetic number, because the mean of its divisors is an integer number (124992000).

Almost surely, 2^21076466775 is an apocalyptic number.

21076466775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21076466775 is an abundant number, since it is smaller than the sum of its proper divisors (26920461225).

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

21076466775 is a wasteful number, since it uses less digits than its factorization.

21076466775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 51.

The spelling of 21076466775 in words is "twenty-one billion, seventy-six million, four hundred sixty-six thousand, seven hundred seventy-five".