20223423978 has 16 divisors (see below), whose sum is σ = 40485344736. Its totient is φ = 6734725200.

The previous prime is 20223423977. The next prime is 20223424019. The reversal of 20223423978 is 87932432202.

It is not an unprimeable number, because it can be changed into a prime (20223423971) 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, 1597201 + ... + 1609812.

It is an arithmetic number, because the mean of its divisors is an integer number (2530334046).

Almost surely, 2^20223423978 is an apocalyptic number.

20223423978 is an abundant number, since it is smaller than the sum of its proper divisors (20261920758).

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

20223423978 is a wasteful number, since it uses less digits than its factorization.

20223423978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208069.

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 20223423978 in words is "twenty billion, two hundred twenty-three million, four hundred twenty-three thousand, nine hundred seventy-eight".