21767608742892 has 48 divisors (see below), whose sum is σ = 52054175588352. Its totient is φ = 7075593544320.

The previous prime is 21767608742881. The next prime is 21767608742963. The reversal of 21767608742892 is 29824780676712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9268348 + ... + 11377059.

It is an arithmetic number, because the mean of its divisors is an integer number (1084461991424).

Almost surely, 2^{21767608742892} is an apocalyptic number.

It is an amenable number.

21767608742892 is an abundant number, since it is smaller than the sum of its proper divisors (30286566845460).

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

21767608742892 is a wasteful number, since it uses less digits than its factorization.

21767608742892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20647598 (or 20647596 counting only the distinct ones).

The product of its (nonzero) digits is 227598336, while the sum is 69.

The spelling of 21767608742892 in words is "twenty-one trillion, seven hundred sixty-seven billion, six hundred eight million, seven hundred forty-two thousand, eight hundred ninety-two".