220021169940 has 240 divisors, whose sum is σ = 810882293760. Its totient is φ = 49235454720.

The previous prime is 220021169933. The next prime is 220021169969. The reversal of 220021169940 is 49961120022.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 220021169895 and 220021169904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 243220 + ... + 706539.

It is an arithmetic number, because the mean of its divisors is an integer number (3378676224).

Almost surely, 2^220021169940 is an apocalyptic number.

220021169940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220021169940 is an abundant number, since it is smaller than the sum of its proper divisors (590861123820).

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

220021169940 is a wasteful number, since it uses less digits than its factorization.

220021169940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949804 (or 949793 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

Adding to 220021169940 its reverse (49961120022), we get a palindrome (269982289962).

The spelling of 220021169940 in words is "two hundred twenty billion, twenty-one million, one hundred sixty-nine thousand, nine hundred forty".