20420656430501 has 8 divisors (see below), whose sum is σ = 22236649471200. Its totient is φ = 18678785554800.

The previous prime is 20420656430477. The next prime is 20420656430543. The reversal of 20420656430501 is 10503465602402.

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 20420656430501 - 2²⁶ = 20420589321637 is a prime.

It is a super-2 number, since 2×20420656430501² (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 (20420656430101) 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, 18530540675 + ... + 18530541776.

It is an arithmetic number, because the mean of its divisors is an integer number (2779581183900).

Almost surely, 2^{20420656430501} is an apocalyptic number.

It is an amenable number.

20420656430501 is a deficient number, since it is larger than the sum of its proper divisors (1815993040699).

20420656430501 is a wasteful number, since it uses less digits than its factorization.

20420656430501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37061082499.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 20420656430501 in words is "twenty trillion, four hundred twenty billion, six hundred fifty-six million, four hundred thirty thousand, five hundred one".