20356249424 has 40 divisors (see below), whose sum is σ = 45520860288. Its totient is φ = 8637724800.

The previous prime is 20356249423. The next prime is 20356249439. The reversal of 20356249424 is 42494265302.

It is a super-2 number, since 2×20356249424² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20356249423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888452 + ... + 911075.

Almost surely, 2^20356249424 is an apocalyptic number.

It is an amenable number.

20356249424 is an abundant number, since it is smaller than the sum of its proper divisors (25164610864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20356249424 is a wasteful number, since it uses less digits than its factorization.

20356249424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799643 (or 1799637 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 20356249424 in words is "twenty billion, three hundred fifty-six million, two hundred forty-nine thousand, four hundred twenty-four".