20313477688 has 32 divisors (see below), whose sum is σ = 44266665600. Its totient is φ = 8558219232.

The previous prime is 20313477677. The next prime is 20313477689. The reversal of 20313477688 is 88677431302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313477689) 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, 3070770 + ... + 3077377.

It is an arithmetic number, because the mean of its divisors is an integer number (1383333300).

Almost surely, 2^20313477688 is an apocalyptic number.

20313477688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20313477688 is an abundant number, since it is smaller than the sum of its proper divisors (23953187912).

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

20313477688 is a wasteful number, since it uses less digits than its factorization.

20313477688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6148219 (or 6148215 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 20313477688 in words is "twenty billion, three hundred thirteen million, four hundred seventy-seven thousand, six hundred eighty-eight".