20460620 has 48 divisors (see below), whose sum is σ = 45163776. Its totient is φ = 7776000.

The previous prime is 20460619. The next prime is 20460623. The reversal of 20460620 is 2606402.

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 = 20460592 and 20460601.

It is not an unprimeable number, because it can be changed into a prime (20460623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37550 + ... + 38090.

It is an arithmetic number, because the mean of its divisors is an integer number (940912).

Almost surely, 2^20460620 is an apocalyptic number.

20460620 is a gapful number since it is divisible by the number (20) 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 20460620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22581888).

20460620 is an abundant number, since it is smaller than the sum of its proper divisors (24703156).

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

20460620 is a wasteful number, since it uses less digits than its factorization.

20460620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 640 counting only the distinct ones).

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

The square root of 20460620 is about 4523.3416850819. The cubic root of 20460620 is about 273.5098238837.

The spelling of 20460620 in words is "twenty million, four hundred sixty thousand, six hundred twenty".