11890020528 has 60 divisors (see below), whose sum is σ = 33331153128. Its totient is φ = 3956716800.

The previous prime is 11890020511. The next prime is 11890020529. The reversal of 11890020528 is 82502009811.

It is a super-2 number, since 2×11890020528² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 11890020492 and 11890020501.

It is not an unprimeable number, because it can be changed into a prime (11890020529) 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, 17851 + ... + 155237.

Almost surely, 2^11890020528 is an apocalyptic number.

11890020528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11890020528 is an abundant number, since it is smaller than the sum of its proper divisors (21441132600).

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

11890020528 is a wasteful number, since it uses less digits than its factorization.

11890020528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138002 (or 137993 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 11890020528 in words is "eleven billion, eight hundred ninety million, twenty thousand, five hundred twenty-eight".