21346266051 has 24 divisors (see below), whose sum is σ = 33648217200. Its totient is φ = 12932640000.

The previous prime is 21346266041. The next prime is 21346266077. The reversal of 21346266051 is 15066264312.

21346266051 is a `hidden beast` number, since 2 + 1 + 3 + 46 + 2 + 6 + 605 + 1 = 666.

It is not a de Polignac number, because 21346266051 - 2¹⁸ = 21346003907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21346265997 and 21346266015.

It is not an unprimeable number, because it can be changed into a prime (21346266041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 261175 + ... + 333023.

It is an arithmetic number, because the mean of its divisors is an integer number (1402009050).

Almost surely, 2^21346266051 is an apocalyptic number.

21346266051 is a deficient number, since it is larger than the sum of its proper divisors (12301951149).

21346266051 is a wasteful number, since it uses less digits than its factorization.

21346266051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74867 (or 74864 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

It can be divided in two parts, 213 and 46266051, that added together give a palindrome (46266264).

The spelling of 21346266051 in words is "twenty-one billion, three hundred forty-six million, two hundred sixty-six thousand, fifty-one".