20268631236 has 24 divisors (see below), whose sum is σ = 54049683520. Its totient is φ = 5791037472.

The previous prime is 20268631213. The next prime is 20268631277. The reversal of 20268631236 is 63213686202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20268631194 and 20268631203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120646531 + ... + 120646698.

Almost surely, 2^20268631236 is an apocalyptic number.

It is an amenable number.

20268631236 is an abundant number, since it is smaller than the sum of its proper divisors (33781052284).

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

20268631236 is a wasteful number, since it uses less digits than its factorization.

20268631236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241293243 (or 241293241 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 20268631236 in words is "twenty billion, two hundred sixty-eight million, six hundred thirty-one thousand, two hundred thirty-six".