20657858777308 has 12 divisors (see below), whose sum is σ = 36151295355000. Its totient is φ = 10328917247312.

The previous prime is 20657858777287. The next prime is 20657858777333. The reversal of 20657858777308 is 80377785875602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1568943 + ... + 6616441.

It is an arithmetic number, because the mean of its divisors is an integer number (3012607946250).

Almost surely, 2^{20657858777308} is an apocalyptic number.

It is an amenable number.

20657858777308 is a deficient number, since it is larger than the sum of its proper divisors (15493436577692).

20657858777308 is a wasteful number, since it uses less digits than its factorization.

20657858777308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6070676 (or 6070674 counting only the distinct ones).

The product of its (nonzero) digits is 1106380800, while the sum is 73.

The spelling of 20657858777308 in words is "twenty trillion, six hundred fifty-seven billion, eight hundred fifty-eight million, seven hundred seventy-seven thousand, three hundred eight".