20121474 has 8 divisors (see below), whose sum is σ = 40242960. Its totient is φ = 6707156.

The previous prime is 20121467. The next prime is 20121533. The reversal of 20121474 is 47412102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

20121474 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20121474.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1676784 + ... + 1676795.

It is an arithmetic number, because the mean of its divisors is an integer number (5030370).

Almost surely, 2^20121474 is an apocalyptic number.

20121474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20121474 is a wasteful number, since it uses less digits than its factorization.

20121474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3353584.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 20121474 is about 4485.6966014210. The cubic root of 20121474 is about 271.9902047366.

Adding to 20121474 its reverse (47412102), we get a palindrome (67533576).

It can be divided in two parts, 2012 and 1474, that added together give a triangular number (3486 = T₈₃).

The spelling of 20121474 in words is "twenty million, one hundred twenty-one thousand, four hundred seventy-four".