20778003532 has 48 divisors (see below), whose sum is σ = 42734184192. Its totient is φ = 8714825280.

The previous prime is 20778003523. The next prime is 20778003539. The reversal of 20778003532 is 23530087702.

It is a super-3 number, since 3×20778003532³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20778003491 and 20778003500.

It is not an unprimeable number, because it can be changed into a prime (20778003539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2149903 + ... + 2159545.

It is an arithmetic number, because the mean of its divisors is an integer number (890295504).

Almost surely, 2^20778003532 is an apocalyptic number.

20778003532 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20778003532 is an abundant number, since it is smaller than the sum of its proper divisors (21956180660).

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

20778003532 is a wasteful number, since it uses less digits than its factorization.

20778003532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13438 (or 13436 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 20778003532 in words is "twenty billion, seven hundred seventy-eight million, three thousand, five hundred thirty-two".