20401442433 has 32 divisors (see below), whose sum is σ = 32254341120. Its totient is φ = 12700074240.

The previous prime is 20401442431. The next prime is 20401442461. The reversal of 20401442433 is 33424410402.

It is a happy number.

20401442433 is a `hidden beast` number, since 204 + 0 + 1 + 4 + 424 + 33 = 666.

It is not a de Polignac number, because 20401442433 - 2¹ = 20401442431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20401442397 and 20401442406.

It is not an unprimeable number, because it can be changed into a prime (20401442431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116698 + ... + 233283.

It is an arithmetic number, because the mean of its divisors is an integer number (1007948160).

Almost surely, 2^20401442433 is an apocalyptic number.

It is an amenable number.

20401442433 is a deficient number, since it is larger than the sum of its proper divisors (11852898687).

20401442433 is a wasteful number, since it uses less digits than its factorization.

20401442433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350134 (or 350128 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 20401442433 its reverse (33424410402), we get a palindrome (53825852835).

The spelling of 20401442433 in words is "twenty billion, four hundred one million, four hundred forty-two thousand, four hundred thirty-three".