20211010 has 16 divisors (see below), whose sum is σ = 36790200. Its totient is φ = 7993216.

The previous prime is 20211007. The next prime is 20211031. The reversal of 20211010 is 1011202.

It can be written as a sum of positive squares in 4 ways, for example, as 6095961 + 14115049 = 2469^2 + 3757^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20210984 and 20211002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10465 + ... + 12244.

Almost surely, 2^20211010 is an apocalyptic number.

20211010 is a deficient number, since it is larger than the sum of its proper divisors (16579190).

20211010 is a wasteful number, since it uses less digits than its factorization.

20211010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22805.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 20211010 is about 4495.6656904178. The cubic root of 20211010 is about 272.3930394122.

Adding to 20211010 its reverse (1011202), we get a palindrome (21222212).

It can be divided in two parts, 2021 and 1010, that multiplied together give a triangular number (2041210 = T₂₀₂₀).

The spelling of 20211010 in words is "twenty million, two hundred eleven thousand, ten".