20437964266 has 16 divisors (see below), whose sum is σ = 32532062400. Its totient is φ = 9609004768.

The previous prime is 20437964257. The next prime is 20437964269. The reversal of 20437964266 is 66246973402.

It is not an unprimeable number, because it can be changed into a prime (20437964269) 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, 3762571 + ... + 3767998.

It is an arithmetic number, because the mean of its divisors is an integer number (2033253900).

Almost surely, 2^20437964266 is an apocalyptic number.

20437964266 is a deficient number, since it is larger than the sum of its proper divisors (12094098134).

20437964266 is a wasteful number, since it uses less digits than its factorization.

20437964266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530653.

The product of its (nonzero) digits is 2612736, while the sum is 49.

The spelling of 20437964266 in words is "twenty billion, four hundred thirty-seven million, nine hundred sixty-four thousand, two hundred sixty-six".