21763061442 has 24 divisors (see below), whose sum is σ = 47156338944. Its totient is φ = 7253886264.

The previous prime is 21763061423. The next prime is 21763061447. The reversal of 21763061442 is 24416036712.

21763061442 is a `hidden beast` number, since 2 + 1 + 7 + 6 + 30 + 614 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21763061397 and 21763061406.

It is not an unprimeable number, because it can be changed into a prime (21763061447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 356623 + ... + 413165.

It is an arithmetic number, because the mean of its divisors is an integer number (1964847456).

Almost surely, 2^21763061442 is an apocalyptic number.

21763061442 is an abundant number, since it is smaller than the sum of its proper divisors (25393277502).

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

21763061442 is a wasteful number, since it uses less digits than its factorization.

21763061442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77934 (or 77931 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

It can be divided in two parts, 21763061 and 442, that added together give a triangular number (21763503 = T₆₅₉₇).

The spelling of 21763061442 in words is "twenty-one billion, seven hundred sixty-three million, sixty-one thousand, four hundred forty-two".