20606280 has 32 divisors (see below), whose sum is σ = 61819200. Its totient is φ = 5494976.

The previous prime is 20606273. The next prime is 20606293. The reversal of 20606280 is 8260602.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20606280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85740 + ... + 85979.

It is an arithmetic number, because the mean of its divisors is an integer number (1931850).

Almost surely, 2^20606280 is an apocalyptic number.

20606280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20606280 is an abundant number, since it is smaller than the sum of its proper divisors (41212920).

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

20606280 is a wasteful number, since it uses less digits than its factorization.

20606280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171733 (or 171729 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20606280 is about 4539.4140591050. The cubic root of 20606280 is about 274.1573323421.

Adding to 20606280 its reverse (8260602), we get a palindrome (28866882).

The spelling of 20606280 in words is "twenty million, six hundred six thousand, two hundred eighty".