20551062 has 64 divisors (see below), whose sum is σ = 50388480. Its totient is φ = 5454336.

The previous prime is 20551061. The next prime is 20551067. The reversal of 20551062 is 26015502.

It is a super-2 number, since 2×20551062² = 844692298655688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20551061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76264 + ... + 76532.

It is an arithmetic number, because the mean of its divisors is an integer number (787320).

Almost surely, 2^20551062 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20551062, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25194240).

20551062 is an abundant number, since it is smaller than the sum of its proper divisors (29837418).

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

20551062 is a wasteful number, since it uses less digits than its factorization.

20551062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 20551062 is about 4533.3279166634. The cubic root of 20551062 is about 273.9122296886.

Adding to 20551062 its reverse (26015502), we get a palindrome (46566564).

The spelling of 20551062 in words is "twenty million, five hundred fifty-one thousand, sixty-two".