20952018 has 12 divisors (see below), whose sum is σ = 45396078. Its totient is φ = 6984000.

The previous prime is 20951993. The next prime is 20952049. The reversal of 20952018 is 81025902.

It can be written as a sum of positive squares in only one way, i.e., 14311089 + 6640929 = 3783^2 + 2577^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20951982 and 20952000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 581983 + ... + 582018.

Almost surely, 2^20952018 is an apocalyptic number.

20952018 is an abundant number, since it is smaller than the sum of its proper divisors (24444060).

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

20952018 is a wasteful number, since it uses less digits than its factorization.

20952018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164009 (or 1164006 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 20952018 is about 4577.3374356715. The cubic root of 20952018 is about 275.6821324792.

The spelling of 20952018 in words is "twenty million, nine hundred fifty-two thousand, eighteen".