20352987 has 12 divisors (see below), whose sum is σ = 29533504. Its totient is φ = 13506480.

The previous prime is 20352973. The next prime is 20352991. The reversal of 20352987 is 78925302.

It is a happy number.

It is not a de Polignac number, because 20352987 - 2¹⁶ = 20287451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20352947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3064 + ... + 7077.

Almost surely, 2^20352987 is an apocalyptic number.

20352987 is a deficient number, since it is larger than the sum of its proper divisors (9180517).

20352987 is a wasteful number, since it uses less digits than its factorization.

20352987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370 (or 10367 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 20352987 is about 4511.4284877409. The cubic root of 20352987 is about 273.0293813726.

The spelling of 20352987 in words is "twenty million, three hundred fifty-two thousand, nine hundred eighty-seven".