20207423438 has 16 divisors (see below), whose sum is σ = 31974808320. Its totient is φ = 9551432376.

The previous prime is 20207423407. The next prime is 20207423443. The reversal of 20207423438 is 83432470202.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20207423398 and 20207423407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551606 + ... + 587097.

It is an arithmetic number, because the mean of its divisors is an integer number (1998425520).

Almost surely, 2^20207423438 is an apocalyptic number.

20207423438 is a deficient number, since it is larger than the sum of its proper divisors (11767384882).

20207423438 is a wasteful number, since it uses less digits than its factorization.

20207423438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139191.

The product of its (nonzero) digits is 64512, while the sum is 35.

The spelling of 20207423438 in words is "twenty billion, two hundred seven million, four hundred twenty-three thousand, four hundred thirty-eight".