20735213107501 has 8 divisors (see below), whose sum is σ = 21241048631544. Its totient is φ = 20229382279680.

The previous prime is 20735213107489. The next prime is 20735213107589. The reversal of 20735213107501 is 10570131253702.

It can be written as a sum of positive squares in 4 ways, for example, as 3299494235401 + 17435718872100 = 1816451^2 + 4175610^2 .

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 20735213107501 - 2²⁵ = 20735179553069 is a prime.

It is a super-2 number, since 2×20735213107501² (a number of 27 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 (20735213107591) 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, 8781525 + ... + 10889701.

It is an arithmetic number, because the mean of its divisors is an integer number (2655131078943).

Almost surely, 2^{20735213107501} is an apocalyptic number.

It is an amenable number.

20735213107501 is a deficient number, since it is larger than the sum of its proper divisors (505835524043).

20735213107501 is a wasteful number, since it uses less digits than its factorization.

20735213107501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348111.

The product of its (nonzero) digits is 44100, while the sum is 37.

The spelling of 20735213107501 in words is "twenty trillion, seven hundred thirty-five billion, two hundred thirteen million, one hundred seven thousand, five hundred one".