20713217641003 has 4 divisors (see below), whose sum is σ = 20996960348488. Its totient is φ = 20429474933520.

The previous prime is 20713217640977. The next prime is 20713217641009. The reversal of 20713217641003 is 30014671231702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20713217641003 - 2⁵ = 20713217640971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20713217641009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141871353633 + ... + 141871353778.

It is an arithmetic number, because the mean of its divisors is an integer number (5249240087122).

Almost surely, 2^{20713217641003} is an apocalyptic number.

20713217641003 is a deficient number, since it is larger than the sum of its proper divisors (283742707485).

20713217641003 is an equidigital number, since it uses as much as digits as its factorization.

20713217641003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283742707484.

The product of its (nonzero) digits is 42336, while the sum is 37.

Adding to 20713217641003 its reverse (30014671231702), we get a palindrome (50727888872705).

The spelling of 20713217641003 in words is "twenty trillion, seven hundred thirteen billion, two hundred seventeen million, six hundred forty-one thousand, three".