20454992 has 10 divisors (see below), whose sum is σ = 39631578. Its totient is φ = 10227488.

The previous prime is 20454989. The next prime is 20455003. The reversal of 20454992 is 29945402.

It can be written as a sum of positive squares in only one way, i.e., 17272336 + 3182656 = 4156^2 + 1784^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639203 + ... + 639234.

Almost surely, 2^20454992 is an apocalyptic number.

It is an amenable number.

20454992 is a deficient number, since it is larger than the sum of its proper divisors (19176586).

20454992 is a wasteful number, since it uses less digits than its factorization.

20454992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278445 (or 1278439 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 20454992 is about 4522.7195358545. The cubic root of 20454992 is about 273.4847439261.

The spelling of 20454992 in words is "twenty million, four hundred fifty-four thousand, nine hundred ninety-two".