20122718 has 32 divisors (see below), whose sum is σ = 38562048. Its totient is φ = 7646400.

The previous prime is 20122703. The next prime is 20122727. The reversal of 20122718 is 81722102.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20122693 and 20122702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4721 + ... + 7907.

It is an arithmetic number, because the mean of its divisors is an integer number (1205064).

Almost surely, 2^20122718 is an apocalyptic number.

20122718 is a deficient number, since it is larger than the sum of its proper divisors (18439330).

20122718 is a wasteful number, since it uses less digits than its factorization.

20122718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 20122718 is about 4485.8352622449. The cubic root of 20122718 is about 271.9958098403.

It can be divided in two parts, 201227 and 18, that multiplied together give a triangular number (3622086 = T₂₆₉₁).

The spelling of 20122718 in words is "twenty million, one hundred twenty-two thousand, seven hundred eighteen".