20490502471 has 8 divisors (see below), whose sum is σ = 20756194880. Its totient is φ = 20224968192.

The previous prime is 20490502469. The next prime is 20490502477. The reversal of 20490502471 is 17420509402.

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 20490502471 - 2¹ = 20490502469 is a prime.

It is a super-3 number, since 3×20490502471³ (a number of 32 digits) contains 333 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 (20490502477) 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, 233431 + ... + 308983.

It is an arithmetic number, because the mean of its divisors is an integer number (2594524360).

Almost surely, 2^20490502471 is an apocalyptic number.

20490502471 is a deficient number, since it is larger than the sum of its proper divisors (265692409).

20490502471 is an equidigital number, since it uses as much as digits as its factorization.

20490502471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79065.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 20490502471 in words is "twenty billion, four hundred ninety million, five hundred two thousand, four hundred seventy-one".