20936405424 has 60 divisors (see below), whose sum is σ = 59449602968. Its totient is φ = 6344363520.

The previous prime is 20936405419. The next prime is 20936405429. The reversal of 20936405424 is 42450463902.

It is an interprime number because it is at equal distance from previous prime (20936405419) and next prime (20936405429).

It is a super-3 number, since 3×20936405424³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20936405429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1796569 + ... + 1808184.

Almost surely, 2^20936405424 is an apocalyptic number.

20936405424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20936405424 is an abundant number, since it is smaller than the sum of its proper divisors (38513197544).

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

20936405424 is a wasteful number, since it uses less digits than its factorization.

20936405424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604786 (or 3604769 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 20936405424 in words is "twenty billion, nine hundred thirty-six million, four hundred five thousand, four hundred twenty-four".