20661162434 has 16 divisors (see below), whose sum is σ = 33813084960. Its totient is φ = 9390351360.

The previous prime is 20661162427. The next prime is 20661162437. The reversal of 20661162434 is 43426116602.

It is a junction number, because it is equal to n+sod(n) for n = 20661162394 and 20661162403.

It is not an unprimeable number, because it can be changed into a prime (20661162437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158837 + ... + 257975.

It is an arithmetic number, because the mean of its divisors is an integer number (2113317810).

Almost surely, 2^20661162434 is an apocalyptic number.

20661162434 is a deficient number, since it is larger than the sum of its proper divisors (13151922526).

20661162434 is a wasteful number, since it uses less digits than its factorization.

20661162434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108625.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 20661162434 in words is "twenty billion, six hundred sixty-one million, one hundred sixty-two thousand, four hundred thirty-four".