20719494 has 12 divisors (see below), whose sum is σ = 44892276. Its totient is φ = 6906492.

The previous prime is 20719471. The next prime is 20719499. The reversal of 20719494 is 49491702.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20719499) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 575524 + ... + 575559.

It is an arithmetic number, because the mean of its divisors is an integer number (3741023).

Almost surely, 2^20719494 is an apocalyptic number.

20719494 is an abundant number, since it is smaller than the sum of its proper divisors (24172782).

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

20719494 is a wasteful number, since it uses less digits than its factorization.

20719494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151091 (or 1151088 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 20719494 is about 4551.8670894480. The cubic root of 20719494 is about 274.6585028234.

It can be divided in two parts, 207 and 19494, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 20719494 in words is "twenty million, seven hundred nineteen thousand, four hundred ninety-four".