21303577242 has 48 divisors (see below), whose sum is σ = 46652617440. Its totient is φ = 7025466336.

The previous prime is 21303577187. The next prime is 21303577249. The reversal of 21303577242 is 24277530312.

It is a junction number, because it is equal to n+sod(n) for n = 21303577197 and 21303577206.

It is not an unprimeable number, because it can be changed into a prime (21303577249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 617953 + ... + 651515.

It is an arithmetic number, because the mean of its divisors is an integer number (971929530).

Almost surely, 2^21303577242 is an apocalyptic number.

21303577242 is an abundant number, since it is smaller than the sum of its proper divisors (25349040198).

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

21303577242 is a wasteful number, since it uses less digits than its factorization.

21303577242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33947 (or 33944 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The spelling of 21303577242 in words is "twenty-one billion, three hundred three million, five hundred seventy-seven thousand, two hundred forty-two".