20606420 has 24 divisors (see below), whose sum is σ = 43394400. Its totient is φ = 8219552.

The previous prime is 20606419. The next prime is 20606423. The reversal of 20606420 is 2460602.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20606392 and 20606401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20606423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7151 + ... + 9609.

It is an arithmetic number, because the mean of its divisors is an integer number (1808100).

Almost surely, 2^20606420 is an apocalyptic number.

20606420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20606420 is an abundant number, since it is smaller than the sum of its proper divisors (22787980).

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

20606420 is a wasteful number, since it uses less digits than its factorization.

20606420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887 (or 2885 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20606420 is about 4539.4294795712. The cubic root of 20606420 is about 274.1579532199.

The spelling of 20606420 in words is "twenty million, six hundred six thousand, four hundred twenty".