20490408502 has 8 divisors (see below), whose sum is σ = 30743605512. Its totient is φ = 10242540000.

The previous prime is 20490408437. The next prime is 20490408509. The reversal of 20490408502 is 20580409402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20490408509) 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, 1322499 + ... + 1337902.

It is an arithmetic number, because the mean of its divisors is an integer number (3842950689).

Almost surely, 2^20490408502 is an apocalyptic number.

20490408502 is a deficient number, since it is larger than the sum of its proper divisors (10253197010).

20490408502 is a wasteful number, since it uses less digits than its factorization.

20490408502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664254.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 20490408502 in words is "twenty billion, four hundred ninety million, four hundred eight thousand, five hundred two".