20001523541 has 8 divisors (see below), whose sum is σ = 20137758720. Its totient is φ = 19865624832.

The previous prime is 20001523499. The next prime is 20001523559. The reversal of 20001523541 is 14532510002.

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 20001523541 - 2³⁴ = 2821654357 is a prime.

It is a super-2 number, since 2×20001523541² (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 (20001525541) 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, 35756 + ... + 203178.

It is an arithmetic number, because the mean of its divisors is an integer number (2517219840).

Almost surely, 2^20001523541 is an apocalyptic number.

It is an amenable number.

20001523541 is a deficient number, since it is larger than the sum of its proper divisors (136235179).

20001523541 is a wasteful number, since it uses less digits than its factorization.

20001523541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168235.

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 20001523541 in words is "twenty billion, one million, five hundred twenty-three thousand, five hundred forty-one".