20702421442 has 8 divisors (see below), whose sum is σ = 31087425600. Its totient is φ = 10339946244.

The previous prime is 20702421437. The next prime is 20702421521. The reversal of 20702421442 is 24412420702.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20702421442.

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, 5629942 + ... + 5633617.

It is an arithmetic number, because the mean of its divisors is an integer number (3885928200).

Almost surely, 2^20702421442 is an apocalyptic number.

20702421442 is a deficient number, since it is larger than the sum of its proper divisors (10385004158).

20702421442 is a wasteful number, since it uses less digits than its factorization.

20702421442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11264480.

The product of its (nonzero) digits is 7168, while the sum is 28.

The spelling of 20702421442 in words is "twenty billion, seven hundred two million, four hundred twenty-one thousand, four hundred forty-two".