20678672448 has 84 divisors (see below), whose sum is σ = 67739077120. Its totient is φ = 5908190976.

The previous prime is 20678672393. The next prime is 20678672461. The reversal of 20678672448 is 84427687602.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (84).

It is a junction number, because it is equal to n+sod(n) for n = 20678672394 and 20678672403.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2560288 + ... + 2568351.

Almost surely, 2^20678672448 is an apocalyptic number.

20678672448 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20678672448 is an abundant number, since it is smaller than the sum of its proper divisors (47060404672).

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

20678672448 is a wasteful number, since it uses less digits than its factorization.

20678672448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128664 (or 5128651 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 54.

The spelling of 20678672448 in words is "twenty billion, six hundred seventy-eight million, six hundred seventy-two thousand, four hundred forty-eight".