25013079021 has 8 divisors (see below), whose sum is σ = 38115168064. Its totient is φ = 14293188000.

The previous prime is 25013079019. The next prime is 25013079029. The reversal of 25013079021 is 12097031052.

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

It is not a de Polignac number, because 25013079021 - 2¹ = 25013079019 is a prime.

It is a super-2 number, since 2×25013079021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25013079021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25013079029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 595549480 + ... + 595549521.

It is an arithmetic number, because the mean of its divisors is an integer number (4764396008).

Almost surely, 2^25013079021 is an apocalyptic number.

25013079021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25013079021 is a deficient number, since it is larger than the sum of its proper divisors (13102089043).

25013079021 is a wasteful number, since it uses less digits than its factorization.

25013079021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191099011.

The product of its (nonzero) digits is 3780, while the sum is 30.

The spelling of 25013079021 in words is "twenty-five billion, thirteen million, seventy-nine thousand, twenty-one".