20193111940 has 24 divisors (see below), whose sum is σ = 42570547992. Its totient is φ = 8045813760.

The previous prime is 20193111937. The next prime is 20193111941. The reversal of 20193111940 is 4911139102.

It can be written as a sum of positive squares in 4 ways, for example, as 10025616384 + 10167495556 = 100128^2 + 100834^2 .

It is not an unprimeable number, because it can be changed into a prime (20193111941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1959171 + ... + 1969450.

It is an arithmetic number, because the mean of its divisors is an integer number (1773772833).

Almost surely, 2^20193111940 is an apocalyptic number.

20193111940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20193111940 is an abundant number, since it is smaller than the sum of its proper divisors (22377436052).

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

20193111940 is a wasteful number, since it uses less digits than its factorization.

20193111940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3928887 (or 3928885 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 20193111940 in words is "twenty billion, one hundred ninety-three million, one hundred eleven thousand, nine hundred forty".