20340433442 has 16 divisors (see below), whose sum is σ = 34874424960. Its totient is φ = 8716051008.

The previous prime is 20340433423. The next prime is 20340433493. The reversal of 20340433442 is 24433404302.

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, 4142 + ... + 201737.

It is an arithmetic number, because the mean of its divisors is an integer number (2179651560).

Almost surely, 2^20340433442 is an apocalyptic number.

20340433442 is a deficient number, since it is larger than the sum of its proper divisors (14533991518).

20340433442 is a wasteful number, since it uses less digits than its factorization.

20340433442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212945.

The product of its (nonzero) digits is 27648, while the sum is 29.

Adding to 20340433442 its reverse (24433404302), we get a palindrome (44773837744).

The spelling of 20340433442 in words is "twenty billion, three hundred forty million, four hundred thirty-three thousand, four hundred forty-two".