20477621300 has 72 divisors (see below), whose sum is σ = 44862363000. Its totient is φ = 8112862720.

The previous prime is 20477621267. The next prime is 20477621323. The reversal of 20477621300 is 312677402.

It can be written as a sum of positive squares in 12 ways, for example, as 8892112804 + 11585508496 = 94298^2 + 107636^2 .

It is a congruent number.

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, 5794334 + ... + 5797866.

It is an arithmetic number, because the mean of its divisors is an integer number (623088375).

Almost surely, 2^20477621300 is an apocalyptic number.

20477621300 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 20477621300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22431181500).

20477621300 is an abundant number, since it is smaller than the sum of its proper divisors (24384741700).

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

20477621300 is a wasteful number, since it uses less digits than its factorization.

20477621300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085 (or 4078 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The spelling of 20477621300 in words is "twenty billion, four hundred seventy-seven million, six hundred twenty-one thousand, three hundred".