20761131658 has 8 divisors (see below), whose sum is σ = 31144040928. Its totient is φ = 10379784684.

The previous prime is 20761131607. The next prime is 20761131661. The reversal of 20761131658 is 85613116702.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20761131658.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356766 + ... + 410857.

It is an arithmetic number, because the mean of its divisors is an integer number (3893005116).

Almost surely, 2^20761131658 is an apocalyptic number.

20761131658 is a deficient number, since it is larger than the sum of its proper divisors (10382909270).

20761131658 is a wasteful number, since it uses less digits than its factorization.

20761131658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781148.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 20761131658 in words is "twenty billion, seven hundred sixty-one million, one hundred thirty-one thousand, six hundred fifty-eight".