20402203012434 has 48 divisors (see below), whose sum is σ = 44611501334400. Its totient is φ = 6738164078688.

The previous prime is 20402203012421. The next prime is 20402203012483. The reversal of 20402203012434 is 43421030220402.

20402203012434 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 220 + 3 + 0 + 1 + 2 + 434 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20402203012398 and 20402203012407.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88691137 + ... + 88920875.

It is an arithmetic number, because the mean of its divisors is an integer number (929406277800).

Almost surely, 2^{20402203012434} is an apocalyptic number.

20402203012434 is an abundant number, since it is smaller than the sum of its proper divisors (24209298321966).

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

20402203012434 is a wasteful number, since it uses less digits than its factorization.

20402203012434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275119 (or 275116 counting only the distinct ones).

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

Adding to 20402203012434 its reverse (43421030220402), we get a palindrome (63823233232836).

The spelling of 20402203012434 in words is "twenty trillion, four hundred two billion, two hundred three million, twelve thousand, four hundred thirty-four".