20111004344400 has 60 divisors (see below), whose sum is σ = 64422250587072. Its totient is φ = 5362934491520.

The previous prime is 20111004344369. The next prime is 20111004344411. The reversal of 20111004344400 is 444340011102.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×20111004344400² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8379583944 + ... + 8379586343.

Almost surely, 2^{20111004344400} is an apocalyptic number.

20111004344400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111004344400 is an abundant number, since it is smaller than the sum of its proper divisors (44311246242672).

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

20111004344400 is a wasteful number, since it uses less digits than its factorization.

20111004344400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16759170308 (or 16759170297 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 20111004344400 its reverse (444340011102), we get a palindrome (20555344355502).

The spelling of 20111004344400 in words is "twenty trillion, one hundred eleven billion, four million, three hundred forty-four thousand, four hundred".