20762985501 has 8 divisors (see below), whose sum is σ = 30759978560. Its totient is φ = 13841990316.

The previous prime is 20762985499. The next prime is 20762985517. The reversal of 20762985501 is 10558926702.

20762985501 is a `hidden beast` number, since 2 + 0 + 7 + 6 + 2 + 98 + 550 + 1 = 666.

It is not a de Polignac number, because 20762985501 - 2¹ = 20762985499 is a prime.

It is a super-2 number, since 2×20762985501² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20762980501) 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, 384499705 + ... + 384499758.

It is an arithmetic number, because the mean of its divisors is an integer number (3844997320).

Almost surely, 2^20762985501 is an apocalyptic number.

It is an amenable number.

20762985501 is a deficient number, since it is larger than the sum of its proper divisors (9996993059).

20762985501 is an equidigital number, since it uses as much as digits as its factorization.

20762985501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768999472 (or 768999466 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 20762985501 in words is "twenty billion, seven hundred sixty-two million, nine hundred eighty-five thousand, five hundred one".