20641262534 has 4 divisors (see below), whose sum is σ = 30961893804. Its totient is φ = 10320631266.

The previous prime is 20641262501. The next prime is 20641262539. The reversal of 20641262534 is 43526214602.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 20641262494 and 20641262503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20641262539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5160315632 + ... + 5160315635.

It is an arithmetic number, because the mean of its divisors is an integer number (7740473451).

Almost surely, 2^20641262534 is an apocalyptic number.

20641262534 is a deficient number, since it is larger than the sum of its proper divisors (10320631270).

20641262534 is a wasteful number, since it uses less digits than its factorization.

20641262534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10320631269.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 20641262534 in words is "twenty billion, six hundred forty-one million, two hundred sixty-two thousand, five hundred thirty-four".