20393948436 has 12 divisors (see below), whose sum is σ = 47585879712. Its totient is φ = 6797982808.

The previous prime is 20393948401. The next prime is 20393948479. The reversal of 20393948436 is 63484939302.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 849747840 + ... + 849747863.

It is an arithmetic number, because the mean of its divisors is an integer number (3965489976).

Almost surely, 2^20393948436 is an apocalyptic number.

It is an amenable number.

20393948436 is an abundant number, since it is smaller than the sum of its proper divisors (27191931276).

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

20393948436 is a wasteful number, since it uses less digits than its factorization.

20393948436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699495710 (or 1699495708 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 51.

The spelling of 20393948436 in words is "twenty billion, three hundred ninety-three million, nine hundred forty-eight thousand, four hundred thirty-six".