21346542676 has 12 divisors (see below), whose sum is σ = 37362688020. Its totient is φ = 10671488960.

The previous prime is 21346542653. The next prime is 21346542727. The reversal of 21346542676 is 67624564312.

It can be written as a sum of positive squares in 2 ways, for example, as 10473475600 + 10873067076 = 102340^2 + 104274^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 418465 + ... + 466696.

It is an arithmetic number, because the mean of its divisors is an integer number (3113557335).

Almost surely, 2^21346542676 is an apocalyptic number.

It is an amenable number.

21346542676 is a deficient number, since it is larger than the sum of its proper divisors (16016145344).

21346542676 is a wasteful number, since it uses less digits than its factorization.

21346542676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891194 (or 891192 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 46.

The spelling of 21346542676 in words is "twenty-one billion, three hundred forty-six million, five hundred forty-two thousand, six hundred seventy-six".