20421322442 has 8 divisors (see below), whose sum is σ = 30683124000. Its totient is φ = 10193614444.

The previous prime is 20421322433. The next prime is 20421322459. The reversal of 20421322442 is 24422312402.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 8521892 + ... + 8524287.

It is an arithmetic number, because the mean of its divisors is an integer number (3835390500).

Almost surely, 2^20421322442 is an apocalyptic number.

20421322442 is a deficient number, since it is larger than the sum of its proper divisors (10261801558).

20421322442 is a wasteful number, since it uses less digits than its factorization.

20421322442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17046780.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 20421322442 its reverse (24422312402), we get a palindrome (44843634844).

The spelling of 20421322442 in words is "twenty billion, four hundred twenty-one million, three hundred twenty-two thousand, four hundred forty-two".