106621020 has 72 divisors (see below), whose sum is σ = 352825200. Its totient is φ = 25847040.

The previous prime is 106621019. The next prime is 106621049. The reversal of 106621020 is 20126601.

It is a happy number.

106621020 is a `hidden beast` number, since 1 + 0 + 662 + 1 + 0 + 2 + 0 = 666.

It is a super-2 number, since 2×106621020² = 22736083811680800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 106620984 and 106621002.

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, 24945 + ... + 28904.

It is an arithmetic number, because the mean of its divisors is an integer number (4900350).

Almost surely, 2^106621020 is an apocalyptic number.

106621020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

106621020 is an abundant number, since it is smaller than the sum of its proper divisors (246204180).

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

106621020 is a wasteful number, since it uses less digits than its factorization.

106621020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53875 (or 53870 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 106621020 is about 10325.7454936678. The cubic root of 106621020 is about 474.1847808118.

Adding to 106621020 its reverse (20126601), we get a palindrome (126747621).

It can be divided in two parts, 106 and 621020, that added together give a palindrome (621126).

The spelling of 106621020 in words is "one hundred six million, six hundred twenty-one thousand, twenty".