20422843428 has 24 divisors (see below), whose sum is σ = 51318940288. Its totient is φ = 6283951776.

The previous prime is 20422843423. The next prime is 20422843429. The reversal of 20422843428 is 82434822402.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (20422843423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65457676 + ... + 65457987.

Almost surely, 2^20422843428 is an apocalyptic number.

It is an amenable number.

20422843428 is an abundant number, since it is smaller than the sum of its proper divisors (30896096860).

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

20422843428 is a wasteful number, since it uses less digits than its factorization.

20422843428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130915683 (or 130915681 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 39.

The spelling of 20422843428 in words is "twenty billion, four hundred twenty-two million, eight hundred forty-three thousand, four hundred twenty-eight".