22077120520 has 192 divisors, whose sum is σ = 62479090800. Its totient is φ = 6958909440.

The previous prime is 22077120511. The next prime is 22077120523. The reversal of 22077120520 is 2502177022.

It can be written as a sum of positive squares in 8 ways, for example, as 3341533636 + 18735586884 = 57806^2 + 136878^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (22077120523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6852510 + ... + 6855730.

Almost surely, 2^22077120520 is an apocalyptic number.

22077120520 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 22077120520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31239545400).

22077120520 is an abundant number, since it is smaller than the sum of its proper divisors (40401970280).

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

22077120520 is a wasteful number, since it uses less digits than its factorization.

22077120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3528 (or 3517 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

Adding to 22077120520 its reverse (2502177022), we get a palindrome (24579297542).

The spelling of 22077120520 in words is "twenty-two billion, seventy-seven million, one hundred twenty thousand, five hundred twenty".