20762921677 has 8 divisors (see below), whose sum is σ = 21888709632. Its totient is φ = 19665634800.

The previous prime is 20762921671. The next prime is 20762921687. The reversal of 20762921677 is 77612926702.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20762921677 - 2¹⁹ = 20762397389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20762921677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20762921671) 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, 7123774 + ... + 7126687.

It is an arithmetic number, because the mean of its divisors is an integer number (2736088704).

Almost surely, 2^20762921677 is an apocalyptic number.

It is an amenable number.

20762921677 is a deficient number, since it is larger than the sum of its proper divisors (1125787955).

20762921677 is a wasteful number, since it uses less digits than its factorization.

20762921677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14250539.

The product of its (nonzero) digits is 889056, while the sum is 49.

The spelling of 20762921677 in words is "twenty billion, seven hundred sixty-two million, nine hundred twenty-one thousand, six hundred seventy-seven".