21203022442 has 8 divisors (see below), whose sum is σ = 36348038496. Its totient is φ = 9087009612.

The previous prime is 21203022437. The next prime is 21203022479. The reversal of 21203022442 is 24422030212.

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, 757250788 + ... + 757250815.

It is an arithmetic number, because the mean of its divisors is an integer number (4543504812).

Almost surely, 2^21203022442 is an apocalyptic number.

21203022442 is a deficient number, since it is larger than the sum of its proper divisors (15145016054).

21203022442 is a wasteful number, since it uses less digits than its factorization.

21203022442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514501612.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21203022442 its reverse (24422030212), we get a palindrome (45625052654).

The spelling of 21203022442 in words is "twenty-one billion, two hundred three million, twenty-two thousand, four hundred forty-two".