20289885316 has 6 divisors (see below), whose sum is σ = 35507299310. Its totient is φ = 10144942656.

The previous prime is 20289885307. The next prime is 20289885337. The reversal of 20289885316 is 61358898202.

It can be written as a sum of positive squares in only one way, i.e., 11612217600 + 8677667716 = 107760^2 + 93154^2 .

It is a super-2 number, since 2×20289885316² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2536235661 + ... + 2536235668.

Almost surely, 2^20289885316 is an apocalyptic number.

It is an amenable number.

20289885316 is a deficient number, since it is larger than the sum of its proper divisors (15217413994).

20289885316 is a wasteful number, since it uses less digits than its factorization.

20289885316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5072471333 (or 5072471331 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 20289885316 in words is "twenty billion, two hundred eighty-nine million, eight hundred eighty-five thousand, three hundred sixteen".