20110421023400 has 96 divisors (see below), whose sum is σ = 46796964322680. Its totient is φ = 8037249024000.

The previous prime is 20110421023369. The next prime is 20110421023411. The reversal of 20110421023400 is 432012401102.

It can be written as a sum of positive squares in 12 ways, for example, as 5978249942116 + 14132171081284 = 2445046^2 + 3759278^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1948490240 + ... + 1948500560.

Almost surely, 2^{20110421023400} is an apocalyptic number.

20110421023400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110421023400 is an abundant number, since it is smaller than the sum of its proper divisors (26686543299280).

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

20110421023400 is a wasteful number, since it uses less digits than its factorization.

20110421023400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17775 (or 17766 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20110421023400 its reverse (432012401102), we get a palindrome (20542433424502).

The spelling of 20110421023400 in words is "twenty trillion, one hundred ten billion, four hundred twenty-one million, twenty-three thousand, four hundred".