2123424720 has 100 divisors (see below), whose sum is σ = 7374991140. Its totient is φ = 566244864.

The previous prime is 2123424671. The next prime is 2123424757. The reversal of 2123424720 is 274243212.

2123424720 is a `hidden beast` number, since 212 + 3 + 424 + 7 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1396367424 + 727057296 = 37368^2 + 26964^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 157365 + ... + 170324.

Almost surely, 2^2123424720 is an apocalyptic number.

2123424720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123424720 is an abundant number, since it is smaller than the sum of its proper divisors (5251566420).

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

2123424720 is a wasteful number, since it uses less digits than its factorization.

2123424720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327714 (or 327699 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 2123424720 is about 46080.6328081549. The cubic root of 2123424720 is about 1285.3230314261.

Adding to 2123424720 its reverse (274243212), we get a palindrome (2397667932).

It can be divided in two parts, 21234 and 24720, that added together give a palindrome (45954).

The spelling of 2123424720 in words is "two billion, one hundred twenty-three million, four hundred twenty-four thousand, seven hundred twenty".