25040032403 has 4 divisors (see below), whose sum is σ = 26128729488. Its totient is φ = 23951335320.

The previous prime is 25040032399. The next prime is 25040032429. The reversal of 25040032403 is 30423004052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25040032403 - 2² = 25040032399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1088697061 = 25040032403 / (2 + 5 + 0 + 4 + 0 + 0 + 3 + 2 + 4 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25040032463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544348508 + ... + 544348553.

It is an arithmetic number, because the mean of its divisors is an integer number (6532182372).

Almost surely, 2^25040032403 is an apocalyptic number.

25040032403 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25040032403 is a deficient number, since it is larger than the sum of its proper divisors (1088697085).

25040032403 is a wasteful number, since it uses less digits than its factorization.

25040032403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088697084.

The product of its (nonzero) digits is 2880, while the sum is 23.

Adding to 25040032403 its reverse (30423004052), we get a palindrome (55463036455).

The spelling of 25040032403 in words is "twenty-five billion, forty million, thirty-two thousand, four hundred three".