20626420 has 24 divisors (see below), whose sum is σ = 44239104. Its totient is φ = 8074656.

The previous prime is 20626399. The next prime is 20626429. The reversal of 20626420 is 2462602.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20626391 and 20626400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20626429) 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, 10032 + ... + 11911.

It is an arithmetic number, because the mean of its divisors is an integer number (1843296).

Almost surely, 2^20626420 is an apocalyptic number.

20626420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20626420 is an abundant number, since it is smaller than the sum of its proper divisors (23612684).

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

20626420 is a wasteful number, since it uses less digits than its factorization.

20626420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21999 (or 21997 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20626420 is about 4541.6318653101. The cubic root of 20626420 is about 274.2466211542.

The spelling of 20626420 in words is "twenty million, six hundred twenty-six thousand, four hundred twenty".