20504253150400 has 84 divisors (see below), whose sum is σ = 50472051339160. Its totient is φ = 8198649446400.

The previous prime is 20504253150377. The next prime is 20504253150401. The reversal of 20504253150400 is 405135240502.

It is not an unprimeable number, because it can be changed into a prime (20504253150401) 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, 1919515 + ... + 6685285.

Almost surely, 2^{20504253150400} is an apocalyptic number.

20504253150400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20504253150400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25236025669580).

20504253150400 is an abundant number, since it is smaller than the sum of its proper divisors (29967798188760).

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

20504253150400 is a wasteful number, since it uses less digits than its factorization.

20504253150400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4768482 (or 4768467 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 20504253150400 its reverse (405135240502), we get a palindrome (20909388390902).

The spelling of 20504253150400 in words is "twenty trillion, five hundred four billion, two hundred fifty-three million, one hundred fifty thousand, four hundred".