20626788 has 72 divisors (see below), whose sum is σ = 59602368. Its totient is φ = 5436288.

The previous prime is 20626787. The next prime is 20626789. The reversal of 20626788 is 88762602.

It is an interprime number because it is at equal distance from previous prime (20626787) and next prime (20626789).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (20626783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13470 + ... + 14922.

Almost surely, 2^20626788 is an apocalyptic number.

20626788 is a gapful number since it is divisible by the number (28) 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 20626788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29801184).

20626788 is an abundant number, since it is smaller than the sum of its proper divisors (38975580).

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

20626788 is a wasteful number, since it uses less digits than its factorization.

20626788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493 (or 1478 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 20626788 is about 4541.6723792013. The cubic root of 20626788 is about 274.2482521071.

The spelling of 20626788 in words is "twenty million, six hundred twenty-six thousand, seven hundred eighty-eight".