20411678488 has 8 divisors (see below), whose sum is σ = 38271897180. Its totient is φ = 10205839240.

The previous prime is 20411678479. The next prime is 20411678489. The reversal of 20411678488 is 88487611402.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20411678488² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20411678489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275729898 + ... + 1275729913.

Almost surely, 2^20411678488 is an apocalyptic number.

It is an amenable number.

20411678488 is a deficient number, since it is larger than the sum of its proper divisors (17860218692).

20411678488 is a wasteful number, since it uses less digits than its factorization.

20411678488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551459817 (or 2551459813 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 49.

The spelling of 20411678488 in words is "twenty billion, four hundred eleven million, six hundred seventy-eight thousand, four hundred eighty-eight".