20343157658 has 8 divisors (see below), whose sum is σ = 30543284820. Its totient is φ = 10162062720.

The previous prime is 20343157651. The next prime is 20343157669. The reversal of 20343157658 is 85675134302.

It can be written as a sum of positive squares in 2 ways, for example, as 18198819409 + 2144338249 = 134903^2 + 46307^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20343157651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4755383 + ... + 4759658.

Almost surely, 2^20343157658 is an apocalyptic number.

20343157658 is a deficient number, since it is larger than the sum of its proper divisors (10200127162).

20343157658 is a wasteful number, since it uses less digits than its factorization.

20343157658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9516112.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 20343157658 in words is "twenty billion, three hundred forty-three million, one hundred fifty-seven thousand, six hundred fifty-eight".