11731020 has 192 divisors, whose sum is σ = 41803776. Its totient is φ = 2396160.

The previous prime is 11731019. The next prime is 11731033. The reversal of 11731020 is 2013711.

11731020 = 64² + 65² + ... + 328².

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 221314 + ... + 221366.

It is an arithmetic number, because the mean of its divisors is an integer number (217728).

Almost surely, 2^11731020 is an apocalyptic number.

11731020 is a gapful number since it is divisible by the number (10) 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 11731020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20901888).

11731020 is an abundant number, since it is smaller than the sum of its proper divisors (30072756).

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

11731020 is a wasteful number, since it uses less digits than its factorization.

11731020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 11731020 is about 3425.0576637482. The cubic root of 11731020 is about 227.2193213665.

Adding to 11731020 its reverse (2013711), we get a palindrome (13744731).

The spelling of 11731020 in words is "eleven million, seven hundred thirty-one thousand, twenty".