20284356508 has 24 divisors (see below), whose sum is σ = 38439433760. Its totient is φ = 9310282560.

The previous prime is 20284356493. The next prime is 20284356539. The reversal of 20284356508 is 80565348202.

It is a super-2 number, since 2×20284356508² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1068168 + ... + 1086991.

Almost surely, 2^20284356508 is an apocalyptic number.

It is an amenable number.

20284356508 is a deficient number, since it is larger than the sum of its proper divisors (18155077252).

20284356508 is a wasteful number, since it uses less digits than its factorization.

20284356508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155357 (or 2155355 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 43.

The spelling of 20284356508 in words is "twenty billion, two hundred eighty-four million, three hundred fifty-six thousand, five hundred eight".