20211245400 has 96 divisors (see below), whose sum is σ = 65379029760. Its totient is φ = 5155328640.

The previous prime is 20211245399. The next prime is 20211245407. The reversal of 20211245400 is 454211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211245407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 718492 + ... + 746091.

It is an arithmetic number, because the mean of its divisors is an integer number (681031560).

Almost surely, 2^20211245400 is an apocalyptic number.

20211245400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211245400 is an abundant number, since it is smaller than the sum of its proper divisors (45167784360).

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

20211245400 is a wasteful number, since it uses less digits than its factorization.

20211245400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464625 (or 1464616 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 20211245400 its reverse (454211202), we get a palindrome (20665456602).

It can be divided in two parts, 2021 and 1245400, that added together give a palindrome (1247421).

The spelling of 20211245400 in words is "twenty billion, two hundred eleven million, two hundred forty-five thousand, four hundred".