20433633428 has 12 divisors (see below), whose sum is σ = 38509540020. Its totient is φ = 9430907712.

The previous prime is 20433633427. The next prime is 20433633439. The reversal of 20433633428 is 82433633402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1631190544 + 18802442884 = 40388^2 + 137122^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20433633391 and 20433633400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20433633427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196477193 + ... + 196477296.

It is an arithmetic number, because the mean of its divisors is an integer number (3209128335).

Almost surely, 2^20433633428 is an apocalyptic number.

It is an amenable number.

20433633428 is a deficient number, since it is larger than the sum of its proper divisors (18075906592).

20433633428 is a wasteful number, since it uses less digits than its factorization.

20433633428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392954506 (or 392954504 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 38.

The spelling of 20433633428 in words is "twenty billion, four hundred thirty-three million, six hundred thirty-three thousand, four hundred twenty-eight".